I think that finally I found the right list for me. Thanks again for the help One more question: Anybody knows where can I find documentation about the structure of the IIS log files? Because there are some columns like cs-method, cs-uri-stem, cs-uri-query, sc-status and sc(user-agent) that I cannot understand. Thanks again Mauricio Fernández S. IT Manager FDTA - Valles Tel. 591 4 4525160 Fax. 591 4 4115056 mfernandez@xxxxxxxxxxxxxxx www.fdta-valles.org