I've recently experienced a glitch with Tk::TableMatrix, with Perl 5.8.8. When you build the module, the makefile creation would fail. I'm not sure why, because I have no trouble building any other modules. I did find a work-around-hack..... I have a system using Perl 5.8.7 and ran "perl Makefile.PL" with it(which worked), copied the makefile over to my Perl5.8.8 system, adjusted all the locations, and ran make. It worked. I've reported it as a bug, and it's been reported before by others.