Make sure to format your harddrive as either:
The following formats should be avoided, as they cause the Konnekt / PowerCore hardware to not be properly recognized on your system. The only way around that, is to reformat your harddrive and re-install Mac OS X, your applications and Konnekt / PowerCore drivers:
Mac OS Extended (Case-sensitive, Journaled),
Mac OS Extended (Case-sensitive),
Unix File System.