how long do you wait? cause its possibly its just not long enough...or maybe your just have the
"redhat issue" with rpm packages which is solved by typing:
rm -rf /var/lib/rpm/__db.*
as root...and then trying to install the rpm again...but in any case i will post the link to the step by step i posted on LQ.org that has a complete success rate, so if you wanted to do it yourself then
look at this