This module makes admin/reports/request-test URL return 500 Internal Server Error

This makes all Drupal http_request communication fail. The 500 status code shows up in the Apache "error.log" with messages like this one:

[Fri Apr 09 13:09:14 2010] [error] [client 172.24.54.179] PHP Fatal error:  require_once() [<a href='function.require'>function.require</a>]: Failed opening required './sites/all/modules/cck/theme/theme.inc' (include_path='.:/usr/share/pear:/usr/share/php:/var/www/epractice1') in /var/www/epractice1/sites/all/modules/cck/content.module on line 178

It is as if PHP include_path were incorrect. I have tried to trace it but something happens inside this module..... If I disable this module everything works well.

¿can anybody look into it?

Just visit http://....../admin/reports/request-test, it should return the string "request-test".