Can you find the keyword 'fail' or 'error' within either of the logs (not including the error directories and files)?
If not post the contents of your bkupinst.log.
I ran into some MSDE install issues while installing BE9.1. In order to correct, I had to remove MSDE from my system, and attempt an isolated install of just MSDE. The msde error logs were able to suggest a registry/file change for the sqlsrv32.dll, and a second error suggested (since my system was using certificates) that I updated the registry by adding certificate=0.
Tom