C# .net console application, leadtools problem on XP

Question

I'm not sure what group to post. I have C# .net console application compress image using leadtools library. I developed and tested on my machine - XP SP2, .NET Framework 1.1.4322, leadtools v13.0.1.69, and custom library that called leadtools to compress image. It was work fine on my laptop but when I moved it to the server (which have XP - not SP2, .NET Framework, leadtools and custom library are same version), it didn't work. It just stop right where an application call my custom library. Same application works on Windows 2000 Server. I'm not sure what's going on here. I'm just start coding C# for a short time. If anybody could give me suggestion, I'll appreciate it.