bluetooth not working after memory upgrade

Hello. We upgraded the memory in my husband's mac mini to 8GB, now the bluetooth doesn't work. I cannot find the original discs, but I do have a set of snow leopard discs that I purchased to upgrade my mbp from leopard to snow leopard.

The ram works fine, just cannot get the bluetooth to work.

Does anyone have any ideas? Do I need the original discs, or can I use my set of discs that I purchased to re-install os to make bluetooth work?

Or could it possibly be something different?

Any ideas would be greatly appreciated.

Thank you in advance.