It's not too easy to replace the SMAP driver since I changed the way the driver and network protocol stacks work, to make it easier to maintain. Everything is still beta right now, so using it on an everyday basis... is not recommended.
Originally Posted by bekax5
What I intended to suggest you to do was to just try the IOP SMAP testing platform, to see whether you can access your PS2 with HDLDump/HDLDumb.
(Or if you don't have a HDD unit installed, a PING test while the SMAP testing platform is loaded will surffice)
I won't say that it'll surely solve your problem (Since we do not know for sure what it is right now), but it may solve your problem if it's a problem with auto-negotiation.
EDIT: Error 203 may also be caused by a faulty adaptor or DEV9 expansion interface... so it's best if you can prove that the adaptor is working. I heard that bent/broken pins on the adaptor is a common culprit.
SCPH-10000 S. MINOKAMO v1.01 (Defunct)
SCPH-10000 S. KISARAZU v1.00 (faulty)
SCPH-15000 S. KOHDA (With warranty seal!) :D
DESR-5100 S. EMCS