I have the same problem, installed all code, double checked...tripled checked.
The drop down does not appear at all, and not much in the admin, dissapointed. I was hoping for more reporting and tracking of sources. also to have sources placed into customer info, data base etc for data tracking.
I am using this for tracking sales..
I am thinking it is a problem with my version of OS..upgraded to 2C2A... not MS2...so quite possibly I screwed up with installing on the wrong version. all seems fine otherwise...but no dropdown ! no text field, nada....
has anyone installed this wonderful contribution on the 2c2a version successfully? does anyone have any patches or? stumped and dissapointed...but kudos to this great contribution!