Anti-Splog Fatal Error & Domain not registered.

Running WPMU 2.9.2 & BP1.2

When using the button to "check" the API key it gives the error...

"Your server IP and WPMU Site Domain is not yet registered for this API Key. You are attempting to connect from 204.236.134.106." Fix it here»

I go in and the blog is registered with the right domain & IP address.

The bigger issue is I am unable to even activate the plugin and encounter the error

"Plugin could not be activated because it triggered a fatal error."

At first I thought it was because I had just signed up today and waiting for activation... can you help?