This would normally go in the "Newbie" section (I will report it to be moved)
Fedora is now up to version 6 or 7, so upgrading version 3 is not going to be very rewarding--it would be much better to just install the newer version.
If you do want to stick with v.3, you will have to give us a better description--e.g. what error messages are you getting? Also, why not update using the package manager?