where did you get the rpm and for what systems was the rpm built for ?
How are you trying to install it ?
the not so good way with rpm or using the correct method using yum
please include the full install command you used and the full error next time .
if you got it from here
http://www.google.com/chat/video/download.html
then it will most likely never install on the old RHEL 5.4
it was built for fedora 12 or 13
red hat locks the major versions of software , with 5.4 that locking was when 5.0 came out - in 2007
check your paid for access to the red hat support
( that is one of the reasons you DID buy a license for rhel . That and the security / bug fix software updates)