an attempt was made to access socket in a way forbidden by its access permission

[tsfaridi]

I am working on Silverlight....
I am using MatriX XMPP SDK for facebook chat integration. I am following this tutorial, under section 3.1 it talks about connecting to a XMPP server. I am using following details:
Username: My facebook username (http://www.facebook.com/username)
Password: My facebook password
Domain: chat.facebook.com
Port: 5222

But I am getting "An attempt was made to access a socket in a way forbidden by its access permissions" error. Kindly help me sorting it out.

[Momerath]

One cause of this error is having something else already running that is trying to use the same port. Check your processes and make sure you don't have something running that shouldn't be (like previous versions of your software).

Otherwise, I'd contact the creators of the XMPP library you are using.

[tsfaridi]

Thank you for your response! There is no such process... I have already checked that...in early debugging!