Software Deployment

Hi I have a project I'm working on that requires me to have the Installscript Engine installed before the application is installed. Normally not a problem, I can just add a merge module for this into the transform file and the app installs fine. But in this case I still get the message indicating the script engine is missing. I thought that maybe the application was using a different version available in Installshield so I created an .msm project from the ISSCRIPT.msi provided with the application. I tried importing this one in as well and still have the same issue. Anyone have any insight as to what is causing this issue? I'm running out of ideas.