Another USB 2.0 problem

I have a Compaq SR1010z (PU166AV) which has 6 usb 2.0 ports.
Every time I plug into one (iphone) I get the popup that says something like "You need to plug into a high speed port to get full speed with this device..." In the device mgr. none of the usb ports show up as "enhanced".
I've uninstalled the stack and let windows reinstall them all, but still nothing. I've also looked for drivers, but can't find anything. Also disabled "legacy" in BIOS. Any suggestions?

Thanks in advance,
CJ