Sometimes the Client tries to attach coins to blockchain network and it fails.
Just try again.

It also could be because you might only have 1 key loaded. Goto your history tab and make sure the history tab is showing that you have 2 private keys connected.


If it's persistent then goto: Settings -> General Settings     and make sure you turn on "Create Debug File on Exit"

Then close the Client and look in your C:/BitBay directory. There should be a debug text document.
And PM that file to David here. That file is designed for the sole purpose of bugs. So of course, David would not allow it to provide any info other than bugs (priv keys are safe, etc)