Blank page under 'Log files management'

[fleblic]

address page:
http://localhost/gesdoc/out/out.LogManagement.php

There are these logs in my data folder:
20100826.log
20100827.log
20100828.log
20100830.log

I can not see the header (global menu , etc). Page is is completely blank.

Everything else is working perfectly except this log administration issue.

Thanks.