Samsung Captivate--AT&T net surfing

[wegriffin8642]

When on the AT&T phone system, I get the message that "this url is blocked" when I try to surf the net. However, in the wifi mode, I have no problems whatsoever. Anyone else having this experience? Any solutions for it?

 

[ls377]

Is it one specific url, or is it the same for any website?