Addon Packaging for SAP Business One 9.0 and Installshield 10

Hi Everyone,

I am doing the addon dev work since 3.5 years and have never been in this trouble. We are doing the addon packaging fine till SAP B1 8.8, but Now I am having problem in packaging the addon for SAP B1 9.0 PL2

Following is the Information

SAP Business One 9.0 64 Bit

1. Visual Studio 2010, Target Platform Any CPU

2. Installshield 2010

3. Installation Script, attached

Problem, add on tries to install then wait for specified installation time then says installation failed. After re-login sap b1, its saying executable not found.