I am having difficulty logging onto a website that requires a user name and password. I can access the internet just fine, and also have no problems accessing general websites. Any advise???

Moved to General Blackberry Discussion

My first question is: Can you log onto other websites? Or is this the only site you've tried to log into?

Try wap.blackberryforums.com (no http:\\www in front of that). That's the wap version of BlackBerryForums.

I can access other websites that require a user name and password (ex. Yahoo).

Try changing your browser emulation mode. Browser > Browser Configuration. I think Internet Explorer probably works best, but you can try them all.