[TxMt] LaTeX Cite completion

I am new to TextMate, and am using it for LaTeX, and finding it loads of fun. I can't seem to get cite completion to work, however. If I put the caret inside a \cite{} command, along with some text, and press escape, it does complete the citation and cycle through my bibtex database. But if I press option-esc, it gives me an error message in a tooltip. (The error declares that it cannot find my bibtex database.) I'm expecting it to give me a menu of citation choices.

I have a standard MacTeX setup, running on a MacBook under OS 10.5.2. My bibtex database is found in ~/Library/texmf/bibtex/bib.

Any suggestions? Thanks in advance.

Kyle