Hi, I had some troubles with Tomcat working with IIS. I found an answer to my problem on the developper mailing list: http://marc.theaimsgroup.com/?l=tomcat-dev&m=98072686213739&w=2 I was particularly happy to find this comment: In your registry when you add to the HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\W3SVC\Parameters -- Filter DLLs key. Make sure that you DO NOT include the isapi_redirect.dll in this string. For example if you have put the dll in a bin\win32\i386 directory in your jakarta-tomcat directory the key value should be c:\jakarta-tomcat-3.2.1\bin\win32\i386This was a major headache for me, even though the directions say FULL PATH they only mean PATH. For all of you that were always getting a 404 error because tomcat was always looking for /jakarta/isapi_redirect.dll instead of the URL you typed in, this is the answer. I hope this will help other users ... Lise PS: pardon me for my bad English...