http://msdn.microsoft.com/en-us/library/ms537503.aspx
i was having issues viewing pages because the Custom User Agent field was blank. I have since inputed as seen below and it works PERFECTLY!
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)"
this string tells the server that you are using IE 6.0 and am on a WinXP machine.