Miscrosoft Integration Services Gives An Error Of Sript Task Failed

In our package we have a script task that renames the files in the server (Windows 2003) where the package is deployed.

When we execute the project from the development environment(IDE), then it works fine and doesn't give any error.

However, when we deploy the package after configuring the Configuration file properly, then it throws up a "Script Task Failed" error and the the package execution fails.

We checked all the variable values from the development environment in the current package. The child variables take the variable values from the parent package and the configuration file.

It works fine, which implies that there is no problem with the script (This same script was working perfectly earlier - We have made NO changes to the script task.)

Another issue is that we are not able to debug the script task even if we put breakpoints in the script. The control flow simply doesn't stop at the breakpoints.