Unable to find JDBC driver problem

Hi,

I am having a bit of an issue with a JDBC driver and wondering if anyone has also experienced the same issue. I wrote some programs under R2012a and they work fine, installing the drivers and adding to the classpath and library path files was straight forward. However, when I set up the same drivers and programs for R2012b I get a "Unable to find JDBC drivers" message even though the setups unter R2012a and R2012b are identical.

Anyone seen/experienced this before??

Cheers