Fetch Specifications and Regular Expressions

Hello Everyone,

I have been searching through my various WebObjects books, the  
archives for this list and the web for a solution to my problem but I  
can't find it.

I have a fetch specification:

((contest.contestEvent like $contest) and (processed = $processed)  
and (schoolNumber like $schoolNumber))

For the value of $schoolNumber I want to pass in a regular expression  
like ^05(69|70|71|72).  For some reason when try to fetch objects  
(after having passed in that string) it returns no objects (even  
though I know there are some in the test database.  I have tried a  
few variations on the regex such as ^05(69|70|71|72)????? etc.  Can  
anyone point out what i am doing wrong?  Can I even use regular  
expressions with a fetch specification?

Regards,
Jeff