Global crash and system slowdown when enabled in a drupal 4.7.2

Issue Summary

Hi,

I installed your module in "the normal way" and after this I won't be able to load the modules pages again.
After enabled, rest of the pages are shown but it takes a looong time to show them so I need to remove the module directly at the "system" table.

PHP don't report nothing but Apache shows:

Premature end of script headers: php-script

Does it mean I won't be able to use your module on my drupal 4.7.2?
Any clue about how to fix it?

I tested the actual release, as well as the 4.7 CVS one.

Thanks,

m.