PCI Simple communications Controller

Hi

Last week I replace the H/D on my Dimension 4400, machine, after installing the OS and all the drivers form the Driver CD which comes with the computer, everything works fine. only problem is when I boot the computer I will get a " Found New Hardware window saying " PCI Simple Communications Controller" and its try to install the drivers for it, and ask me to search for the drivers, I put the drivers CD and extract all the drivers again into the " c:/Dell" folder and point the search path to that folder, but the system comes up saying unable to find the driver. So I have a Yellow mark on this under the device manager, and every time when I turn the computer on I get this found new Hardware window. I did not install any new hardware on this machine. I have a Hp Office Jet 6110xi printer connecting to on UBS port, and a 100mb Zip drive connected to the parallel port. Where can I get the drivers for this device? I really appreciate some help on this issue.

Thank You

Raghu