windows installer - Calling a powershell script from InstallShield project -

i'm having weird problem.

i have installshield project (which creates setup.exe) contains custom action item - calling powershell script.

all script install 3 adobe reader updates (1 exe file , 2 msp files) on top of installed adobe reader 11.0.0.

when i'm calling script self - works fine.

however, after setup.exe finishes, seems 1 update (the exe file) installed (the adobe reader version after install 11.00.10 result of running exe file..).

all 3 adobe updates sit in same folder , powershell script first sets location folder. when running updates manually after installation - works fine , updates 10.00.22 (what should be).

any ideas why happening?

here's powershell script:

    set-location  "c:\myproject\adobeupdates"  start-process .\adberdr11010_en_us.exe -argumentlist '/q /norestart /spb /rs /msi' -windowstyle hidden -wait  ping 1.1.1.1 -n 1 -w 10000  # tried add delay wasn't helpful  start-process -filepath “adberdrupd11021.msp” -argumentlist '/qn' -wait  start-process -filepath “adberdrupd11022_incr.msp” -argumentlist '/qn' -wait 

thank much

solved it, working script:

 set-location  "c:\myproject\adobeupdates"  start-process .\adberdr11010_en_us.exe -argumentlist '/q /norestart /spb /rs /msi' -windowstyle hidden -wait  ping 1.1.1.1 -n 1 -w 10000  start-process .\adberdrupd11021.msp -argumentlist '/qn' -wait  start-process .\adberdrupd11022_incr.msp -argumentlist '/qn' -wait 

i'm not sure different , love explain anyway works fine now.