ADVAPI vs. NTLM

I am trying to logon to a Server 2003 machine from an ASP script. The purpose of this is to allow users that are successfully logged into my website to be logged into the server, so they can have permission to access certain folders. -- BUT -- Although I am successfully logging into the server, I am still receiving the Windows password prompt when I try to access a folder that does not have anonymous access permisson. I already set all the permissions right and I still cant login!

I noticed, in the event viewer, that if I log in by using the code, I am using the ADVAPI process. If I login using the windows prompt, it is using the NTLM process. Is this what is causing me my strife? If this still doesnt make sense, here is another post that I posted in the ASP section http://forums.aspfree.com/showthrea...7600#post137600. I am hoping you system admins might know something I dont. Thanks for your help.