Curveworks in X5

I was hoping to post to Oberon's forum, but it's not taking registrations and I can't find out if I have an account.   I'm trying to use Curveworks for CorelDraw X5.  I have a license for Curveworks on X3.  I was assuming that I'd have to get a new registration for the new installation.  However, I keep getting "Run-time error '6': Overflow"  and it doesn't even ask me for a license.

I just updated X5 to SP3.  The other issue that might be a factor is that I still have CorelDraw X3 installed.  How do I troubleshoot further?

Thanks,

Bill