Not able to invoke exe from published solution

Need to invoke abc.exe from my 4.5 VS web application which is stored under the path C:XYZ.

The command used for the same is C:\XYZ\abc.exe -PZ:\XYZ\123456

Here Z:\XYZ\123456 is a virtual path and some images are stored inside it.

This abc.exe will render images form virtual path and show the same. This works fine when I run the application but when I publish the solution it is not working.

Here is My code:

 string FileName1 = WebConfigurationManager.AppSettings["FileName1"].ToString(); //"C:\XYZ\abc.exe"

 string FilePath = WebConfigurationManager.AppSettings["ImageURL"].ToString(); //"-PZ:\XYZ\"

 ProcessStartInfo TestPS= new ProcessStartInfo();

 TestPS.FileName = FileName1;

 TestPS.Arguments = FilePath ;

 Process.Start(TestPS); 

Anyone share ur answers

Thanks,

Sathish