When deleting crates make sure that 'protect library' and 'read iTunes music library' are unchecked.
Highlight the crates and hold down ctrl+delete.

As for your bpms, did you create a bpm column in SSL?

If you have and the bpms aren't there do this:

1. Close SSL.
2. Open iTunes.
3. Highlight your tracks.
4. Go to the advanced tab.
5. Select 'convert id3 tags'.
6. Convert to 'none'.
7. Go back to the 'convert id3 tags' option and convert to version '2.3'.
8. Open up SSL and re-scan tags.

That should work:)