Realtek 8139 + MiamiDX + DHCP => reboot

[koshman]

Hi,
I recently bought a Mediator 4000Di for my A4000D. After a few initial issues, I have a Voodoo3 running in it happily now in 1680x1050 24bit. Yesterday I installed a fast ethernet PCI card with the Realtek 8139 chipset, but I`m not able to make it run. I`m using MiamiDX evaluation version and the connection is through DHCP. I set all the parameters according to a guide, using the SanaII fast ethernet driver supplied by Elbox on the MM CD. When I hit the Online button I get the message "Finding IP addresses, please wait", after a second the Amiga freezes and reboots.
I have the VoodooMem variable set to 8 (also tried the suggested 15 with the same outcome). The Voodoo is in the second slot (from the bottom)
 and the ethernet card in the fourth (the topmost one).
I also tried to lower the resolution to 640x480 8bit, because I don`t know how much of the Voodoo mem the ethernet card needs and 1680x1050 must consume quite a lot, but it didn`t change anything.
The rest of the A4000 internals are standard - 16MB fast, A3640 3.2, no other cards, no battery leakage damage.
I can try experimenting with the card positions. Can the problem be the DHCP? Is there any way how to set my router to do the DHCP part so that the Amiga can be set to a static IP?
I`m probably gonna get a 10Mbps card, because the fast ethernet ones stress the Amiga HW a lot I heard, and 10Mbit should still be plenty fast.

Thanks for your suggestions.

Radim

EDIT: I`m using Bloodwych`s ClassicWB 3.1.

[koshman]

@ matthey: thanks for the suggestion, I should register with Elbox.

@ klapdeur: Thank you. I will try set up my Amiga this way.

@ adolescent: The cards show up correctly with pciinfo. Also MiamiDX says "Finding IP addresses", which I think means that it sees the card and is doing something, because when I use a different driver I get an error message.
MedConfig suggests VoodooMem=15, but I will try it with 16.
I also don't think the slot position matters much, but some people swear it makes a difference...

[koshman]

Yes, I can get MAC address when querying.
The DNS might be a problem, but the freezing and restarting bother me more right now

[koshman]

Well, it does the same thing with Genesis so I guess it's probably the ethernet card. I ordered an old Genius 10Mbps card, I'll see how it goes with that.