Version 10.1 includes Microsoft Visual Studio 2005 Premier Partner Edition, so there is nothing else to buy. If you installed from CD, this should be present on your system. It supports both 32-bit and 64-bit development.
Please run the attached program and see if this corrects the problem. If it displays any error messages, please paste them into a reply here.
Please also note that version 11.1 is current. If your support term is still in effect, you can download version 11.1 from the Intel Registration Center. Register your serial number first if you haven't already.
Thanks,
I'll let you know how it goes.