IIS in Win XP Pro

I am running win xp pro and wish to set my comp up as an FTP server using windows built in services. I have followed many tutorials and read many books but i cannot get it to function correctly. It keeps asking me to see if i have right to be in that server or it doesnt exist is what the message claims. Anyone got some advice for me? Maybe i should use another utility? I just thought why not utilize what you are given.