Mac connection problem on Windows Server

Hi All,

Hope I might get some help here on a problem that I have with an Apple Mac OS 10.0.4 connecting to a Windows network. The problem I have is that I have an account on a Windows domain with full access to Internet. Every three or four hours I loose access and I have to reboot the mac to gain access. I get a message ‘Web Page Blocked’ even though I might have been visiting that site minutes before. Rebooting int he middle of a workflow is annoying.

My IT department don’t support MACs so they can’t offer any assistance. If someone can point me in the right direction It would be very much appreciated.

Thank You.