AppleScript Error The variable the panel is not defined

I have been using Leopard OS X 10.5 from the past few years. I had the old version of Split and Contact on it. I never received an error message with this combination. I decided to update my MAC to Snow Leopard OS X 10.6 and then the problem started.
With the update, there is a latest version of Split and Contact which keeps giving error messages.

AppleScript Error The variable thepanel is not defined (-2753)
Can anyone help me with this error message?
