在XP上崩溃与C＃和目录服务

I'm trying to do some simple data retrieval with C# and Directory Services, but for some reason it doesn't work on any XP machines. If I run my code on a Server 2003 machine, there are no problems. I've spent a fair bit of time trying to find out if maybe there's some redistributable I need on XP or if the functionality simply isn't there, but I've found references to other developers who have similar code working under XP. If anyone has any experience or advice to share, I'd appreciate it.I'm trying to do some simple data retrieval wit