How to disable speed autodetection in SIS900?

Hi,

I´m trying to run knoppix in an old PC (PIII 550, with a SIS 900 PCI Ethernet adapter), and i´m having problems to access the internet.
When i boot with the live CD it recognize and configure the card, but (i supose) with speed autodetection. The problem is that, at least in windows, that card only works fine with the manual selection of 10MBps fullduplex. Is that any way to manually choose the speed in knoppix?

Thanks
Paulo Sampaio