Priority Colo Inc.

I have a client who is able to browse his site from http://____.com but not from http://www._____.com. I can from my vantage point, and have tested using anybrowser.com - but unsure why he can't browse with the www prefix? Any ideas... thoughts? Could this be something with his local ISP? His intern...

In a mistake while going into my cpanel, I got an error which immediately redirected me to "Internet-Optimizer.com" Is this a trojan horse in my system or is this a prioritycolo thing? The url i was taken to was... http://www.internet-optimizer.com/Help/NavigationError/?e=ERR401&u=http...

Thanks for the advice... I knew there must be an easy way to find it....

Is there a way to access any of the webmail programs without going through the c-panel. If there is, how do I do it?
I was hoping something like http://mail.clientsite.com would do it.
Appreciate any help!