Proxy problems!

Hi,

I have a 9000 Bold through work with OS 4.6.0.185, and I am using the standard bb browser.

When I try to access some addresses like jamlent.com/blackberry or try to install CB, a box pops up on screen as follows:

Authorization required for
Proxy: xxx.x.xx.xxx
Username:
Domain: COMPANY.COM
Password:

When I then press 'OK' or 'Cancel', the screen HTTP Error 401: Unauthorized comes up and the page then drops out.

I would like to know if there is a user name and password I can fill in myself to get access to the web, or is this my work blocking web access?

Thanks,

Marc