Invoke physically installed application in base image from ThinApp application

Hi,

Here is my scenarios

We have installed Softphone software in base image and we thin installed client application using VMWare ThinApp version ("VMware-ThinApp-Enterprise-4.7.3-891762") that communicate with softphone. Application seems to be working fine when Softphone launched from physical location directly.

We face issue whenever the softphone is invoked from thinapp application.We are having VDI environment with both Windows XP and Windows 7.

we figure out that we need to add settings "ChildProcessEnvironmentExceptions=SOFTPHONE.exe" under Build Options in package.ini to run SOFTPHONE.exe out of virtual environment. We included it and  rebuild the thinapp again. It works perfectly in Windows 7 environment and not in Windows XP.

We also tried with different settings like

ChildProcessEnvironmentDefault=Virtual\External

VirtualizeExternalOutOfProcessCOM=0

Really appreciate your help if someone throw some lights to solve this issue. Thanks in advance.