Network Drive

I have an "Encore" I-Drive hooked into my network which has it's own IP
Address. In all versions of Windows I can use my web browser and get into
the control system. I can Ping the drive and I can even see it on the network
when I click on "Start->Network". When I Click on "I-Drive" I get an error
saying IDrive is not accessable.... Contact the network adminstrator. (There
is no Administrator)

A remote procedure call (RPC) protocol error occurred.

I am using Windows Vista on a Duel Boot system. (Thankfully) Windows XP does
not cause any problems.

Thanks