Hi Piotr, I am not a specialist as Stephan and Ron, so don`t shoot me if i`m wrong! But despite the fact that Stephan and Ron are probably right that (part of ?) your RAM is not setup correct, i would think looking at the RAM test output that there is some RAM available. I had the same error on my (non-CAR) board at revision r4992 and the problem disappeared at r4995. So it might be worth a try to test a newer revision.
Good luck!,Nils.