What key for Google Desktop Module?

I'd like to include a Map in my google desktop module, but for the life
of me, I don't know what key to use. Tried it keyless based on example
code, got the invalid key error. Tried with my BlockRocker.com key, got
the key error. Tried with a key generated for gmodules.com, same error.

What am I doing wrong here? Help!

Thanks in advance,
-Rod.