@Chain: have you tried installinf software fro the PPC first and after that installing the card?
I have 4 A1200 (ALL of them are revision 1D4, seems its the only model that arrived to this land), and 4 PPC cards. From the 4 cards, 3 are same specs as yours.
I used to have a lot of trouble, when installing the card in a previously used 1d4 moterhboard with a Blizzard 1230 (i just switched the cards thinking it would just work fine) with Power Flyer card installed as well
What i did was stripped down the machine, installed software first, then the PPC libraries, then the Power Flyer, then the MEdiator, etc etc etc
Now i can tell you, after a lot of pain i have a system "stable"
Random crashes can also occur if you dont have a cooler on the 040 side. Do you have one? I can take pics of mine so you can have a look...
Also, be sure to feed up the beast with the floppy drive connector as well, to give more power to the card
Hope that helps
Regards
Sebastian