Dynamic Calander Control

I really appreciate the 'UserForm User Control" article that 'lucas' posted a while back and hope someone may be able to help with a problem am having.
It work s great on my computer; (Excel 10), but will not work on any other computers; (1 Excel10, 3 Excel 2007).
The only difference between them is that I installed CalandarControl 11;(MSCAL.ocx) on my computer a while back; {but this code was supposed to have no need for it}
The error I get on the other computers is: 'Compile Error--Can't find project or library'. The debuger stopes at 'ThisDay = Date'.
Thanks lucas for your innovative code. I have learned a lot from it for othe projects.
Best Regards,
Dan Prendergast (danielp1)

Dan, I couldn't find that Article, can you give a link or post the Code you're using.