is this usb dongle on the red hat hardware list ?
without knowing just what this dongle is ?
no one can really help
it should be listed ( while plugged in )
( i like running these commands as root so ... hence the "su -" )
This is RHEL6.4 ? right ?
the current version
so you do have the required support contract
once you know the makr/model and chip in the dongle
Search the RedHat Knowledge base ( your support contract gives you access to it )
but you have to login to the red hat site to use most of it