External program not running using Dim MyProcess As New Process obj

Question

I am trying to launch installs for applications i need to install on every PC I touch.  I am using this code to lauch the "setup.exe /s"  The /s is a switch to have the setup use an answer file.  When I run this the setup hangs as does my program.   I can let it run for a while and it never continues.  If I then end my program the setup continues to install.

Dim MyProcess As New Process

MyProcess.StartInfo.FileName = destDir & appInstalldir & appInstallexe

MyProcess.StartInfo.WorkingDirectory = destDir & appInstalldir

MyProcess.StartInfo.Arguments = appCommandLineSwitch

MyProcess.Start()

MyProcess.WaitForExit()

I tried to have the program launch a cmd file that has the commad to launch the install, it also hangs then resumes when I end the program.

@echo off
echo ---------------------------------------------------------------
echo Installing app....
cmd /C setup.exe /s
echo Completed.
rem ---------------------------------

Then it looks like this.

Dim MyProcess As New Process

MyProcess.StartInfo.FileName = destDir & appInstalldir & batchfile

MyProcess.StartInfo.WorkingDirectory = destDir & appInstalldir

'MyProcess.StartInfo.Arguments = appCommandLineSwitch

MyProcess.Start()

MyProcess.WaitForExit()

 

I can't seem to get this to work correctly  anyone have an idea why the setup gets hung?