The threading model was different in 5.005 vs. 5.6 and which threading model (if any) that Perl supports is determined when Perl is compiled (and Perl doesn't support more than one threading model at a time).

To see which version of threading (if any) you have supported in your copy of Perl, you can search for "thread" in your Config.pm file until you find an entry that is set equal to 'define'. Each threading model requires a different threading module. You might need to use "ithread" (don't know the letter case of that) instead of Thread, for example.

        - tye (but my friends call me "Tye")