I have a similar problem: I get the bright yellow notice box in the upper right corner telling me that "real tracks" for selected instruments can not be found. Although I can sometimes hear the instrument in question, when I open the file in realband it's not there. The problem is so prevalent that I can only use a handfull of real tracks - which is VERY frustrating. When I installed bib I got a message saying there was not enough space on the hard drive (there was) so I installed to a Zip drive. Anyhoo only limited success with BIB/RB so far