For what ever reason, my C# application will not connect with Skype. I try to attach and it times out. Some times my app crashes. I'm on Windows Vista and I have copied from many examples and have registered the dll. What is the problem?

When you attempt to attach, what happens do you timeout?. Have you tried to debug and catch any exceptions?

Can you post some of you code?

I'm sorry for the delay but I have found my own answer. It was because I was on an external hard-drive. I moved it to my desktop and it worked perfectly. I hope this gets fixed!

This is/was NOT you problem. You should have been able to connect IF the program was authorized, it should not be based on program location unless you have some security limiations in place.

So...there is nothing to fix.