Trying to Send test e-newsletter and get [object Object] error

I installed my first WPMU plugin and am having a problem.

It's the e-newsletter. I've typed of my message. However, when I hit send test message I get a popup in the right hand window pane that says, "[object Object]"

Also the right hand window pane is white. I don't see my email message there. I think I am supposed to see what the email looks like there as I edit in the left hand pane?

Any help would be appreciated. bummed to have a problem on the first install.