Unable to detect HDD when installing RHEL 5.5 using RocketRAid 2640x4
 

I have a rocketraid 2640x4 with 2 500gb HDDs configured in my system. I also have a 3.5" usb floppy disk plugged in with the SCSI drivers

When I boot the RHEL 5.5 x86 32 bit installer, i type in "linux dd" at the first screen. Then it asks me to load my drivers via the floppy disk which i do.

When i get to the installation page of Linux after entering my serial key, it is not able to detect my HDD so i am unable to proceed. I have tried using drivers for RHEL 5, 5.1 and 5.2. There are no drivers for 5.5. am i doing something wrong?