VB.net 2008 Invalid resx file on XP

Here is my problem: I developed one application in VB.Net in VS 2008 Express Edition on MS Vista. I published the app and created a setup. Now when I install this application on any Vista machine it works without any problem, but if I install it on XP machine the installation is clean, but when I run the application it will abruptly quit without any warnings / errors right after the splash screen.

Then to investigate what I did was that I copied the original project from my VS 2008 Express Edition in Vista to an XP machine with a full version (VS 2008 Team System) and when I try to compile it (XP / VS2008 Full) , I get one error in one of the resx files. This is probably the same form that is loaded after the splash screen. So I see that some correlation between my application ends up immediately after the splash screen and the inability to compile the main application form. The error I am getting reads like this: "Invalid resx file. Parameter is invalid Line 1374, position 5."

I cannot understand why this is so. Any help is appreciated.

Thank.