ISA-Soundblaster - HELP

I have 2 network cards installed, 1 PCI and 1 ISA. As long as I do not install the ISA-soundblaster I have, everything works perfect. If I install it without Plug&Play, the soundblaster-drivers won't install because I can't get a free DMA. If I use Plug&Play they install and activate but not get started. The event-protocol says ID7000, a parameter is wrong.
Under Win98 which is installed too, everything works fine. So how can I get this soundcard to work under WinNT??

First thing to do is boot into 98 and note down the I/O, IRQ and DMA settings for all three cards. Then boot into NT and configure the cards with the same settings. If the problem is a conflict between the cards, this should get rid of it.