In my version of Linux I needed to install:

Tk
This has a name like Tk800.023. It is a CPAN module by Nick Ing-Simmons. On my very slow linux machine it took quite a while to compile the included C code, but there were no problems.

ptkdb
This is a pure perl module by Andrew E. Page. This excellent module makes it worthwhile to go the trouble of building Tk!

Both are available from CPAN.

It should work perfectly the first time! - toma