asp.net - Could not load file or assembly 'System.Web.Extensions, Version=1.0.61025.0 Error -

i have check site solutions didn't find can me.. host diabled custom error on server, can see real errors.

my web site working flawless in old host, moved new host

please pay attention: old host vps on netvison host

so i'v stoped paying him , now i'm hosting on same netvision host shared host.

so moved files in root folder , config sql details in web.config

i can't load site reason. got errors time. please me!

the error get:

server error in '/' application.

configuration error

parser error message:

could not load file or assembly 'system.web.extensions, version=1.0.61025.0, culture=neutral, publickeytoken=31bf3856ad364e35' or 1 of dependencies. system cannot find file specified. 

source error:

line 49:            <assemblies> line 50:                <add assembly="system.design, version=2.0.0.0, culture=neutral, publickeytoken=b03f5f7f11d50a3a"/> line 51:                <add assembly="system.web.extensions, version=1.0.61025.0, culture=neutral, publickeytoken=31bf3856ad364e35"/>* line 52:            </assemblies> line 53:        </compilation> 

source file:

\filer\sites\nv355601\www.picit.co.il\www\web.config line: 51

my web.config:

<?xml version="1.0"?> <configuration> <appsettings>     <add key="siteaddress" value="http://www.picit.co.il/" />     <add key="sslsiteaddress" value="https://bonsite-secure.co.il/picit/" />      <add key="email_host" value="mail.barak.net.il"/>     <add key="email_contact_name" value="picit"/>     <add key="email_user" value="bonsite-barak.net.il"/>     <add key="email_pass" value="013013"/>     <add key="master_username" value="bonsite"/>     <add key="master_password" value="master123#"/>      <add key="fckeditor:userfilespath" value="~/up/main/"/>     <add key="fckeditor:basepath" value="~/controls/fckeditor/"/> </appsettings> <connectionstrings>     <add name="con" connectionstring="data source=127.0.0.1;initial catalog=db;user=usr;password=pwd;" providername="system.data.sqlclient"/> </connectionstrings> <system.web>     <globalization culture="he-il" uiculture="he-il"/>     <sessionstate mode="inproc"/>     <customerrors mode="off"/>     <identity impersonate="true"/>     <authentication mode="windows"/>     <httpruntime maxrequestlength="22000" minfreethreads="16" executiontimeout="500" usefullyqualifiedredirecturl="false" minlocalrequestfreethreads="4" apprequestqueuelimit="1000" />     <pages theme="front">         <namespaces>             <add namespace="website"/>         </namespaces>         <controls>             <add assembly="system.web.extensions, version=1.0.61025.0, culture=neutral, publickeytoken=31bf3856ad364e35" namespace="system.web.ui" tagprefix="asp"/>             <add tagprefix="upload" namespace="brettle.web.neatupload" assembly="brettle.web.neatupload"/>             <add tagprefix="fck" namespace="fredck.fckeditorv2" assembly="fredck.fckeditorv2"/>             <add tagprefix="swf" tagname="movie" src="~/controls/swf.ascx"/>             <add tagprefix="btn" tagname="friend" src="~/controls/btn_friend.ascx"/>             <add assembly="bound" namespace="customcontrols" tagprefix="asp"/>             <add assembly="skmvalidators" namespace="skmvalidators" tagprefix="vld"/>              <add tagprefix="cc" tagname="upload" src="~/controls/upload.ascx"/>         </controls>     </pages>     <compilation debug="true">         <assemblies>             <add assembly="system.design, version=2.0.0.0, culture=neutral, publickeytoken=b03f5f7f11d50a3a"/>             <add assembly="system.web.extensions, version=1.0.61025.0, culture=neutral, publickeytoken=31bf3856ad364e35"/>         </assemblies>     </compilation>     <httpmodules>         <add name="uploadhttpmodule" type="brettle.web.neatupload.uploadhttpmodule, brettle.web.neatupload"/>         <add name="scriptmodule" type="system.web.handlers.scriptmodule, system.web.extensions, version=1.0.61025.0, culture=neutral, publickeytoken=31bf3856ad364e35"/>     </httpmodules>     <httphandlers>         <remove verb="*" path="*.asmx"/>         <add verb="*" path="*.asmx" validate="false" type="system.web.script.services.scripthandlerfactory, system.web.extensions, version=1.0.61025.0, culture=neutral, publickeytoken=31bf3856ad364e35"/>         <add verb="get,head" path="scriptresource.axd" type="system.web.handlers.scriptresourcehandler, system.web.extensions, version=1.0.61025.0, culture=neutral, publickeytoken=31bf3856ad364e35" validate="false"/>         <add verb="get" path="scriptresource.axd" type="microsoft.web.handlers.scriptresourcehandler" validate="false"/>     </httphandlers> </system.web> <system.webserver>     <modules>         <add name="uploadhttpmodule" type="brettle.web.neatupload.uploadhttpmodule, brettle.web.neatupload" precondition="managedhandler"/>         <add name="scriptmodule" type="system.web.handlers.scriptmodule, system.web.extensions, version=1.0.61025.0, culture=neutral, publickeytoken=31bf3856ad364e35" precondition="managedhandler"/>     </modules>     <handlers>         <add name="scriptresource.axd_get" path="scriptresource.axd" verb="get" type="microsoft.web.handlers.scriptresourcehandler" precondition="integratedmode,runtimeversionv2.0"/>         <add name="scriptresource.axd_get,head" path="scriptresource.axd" verb="get,head" type="system.web.handlers.scriptresourcehandler, system.web.extensions, version=1.0.61025.0, culture=neutral, publickeytoken=31bf3856ad364e35" precondition="integratedmode,runtimeversionv2.0"/>         <add name="*.asmx_*" path="*.asmx" verb="*" type="system.web.script.services.scripthandlerfactory, system.web.extensions, version=1.0.61025.0, culture=neutral, publickeytoken=31bf3856ad364e35" precondition="integratedmode,runtimeversionv2.0"/>     </handlers>     <validation validateintegratedmodeconfiguration="false"/> </system.webserver> </configuration> 

thanks help!

you have ask host asp.net 3.5 framework support.