zentara
Thanks! It now works!!
With the help of liverpole I took your suggestion of updating to the latest Tk.
Here is what we found.
The Tk I installed on the Fedora system were installed with YUM!
I had tried yum update but this wouldn't install anything else.
With help from liverpole we moved the installed Tk directory andre- installed it using CPAN.
And Viola! zee buttons zay are working!

So apparently there are important differences between which version yum and cpan install.
We did a force install on another machine (FC7) and that works too.
Thank you very much!!