Did you instal libusb? That is needed to "contact" AVRISPmkII.
Search the Bascom Help.
And read my struggle with it here: http://www.mcselec.com/index2.php?option=com_forum&Itemid=59&page=viewtopic&t=9899&highlight=libusb
Finally this lead to success: http://sourceforge.net/projects/libusb-win32/files/libusb-win32-releases/1.2.5.0/libusb-win32-devel-filter-1.2.5.0.exe/download
The newest version is 1.2.6.0, but I have no experience with that.
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