Sound OK w/ krnl 2.4 - not OK w/ krnl 2.6

[SunnyB]

Knoppix 3.4: kernel 2.4 My sound card is not recognized but I still get sound OK using XMMS
Knoppix 3.4: kernel 2.6 My sound card is still not recognized but now I get no sound and an error.

Is there a way of getting the driver and soundcard config from krnl 2.4 into 2.6 or is this a known problem? I would rather not buy another soundcard.

Thanks