Uhm, setting it to FULL duplex is exactly the opposite of what you should do. Unless you can explicitly set it to full in both ends it is a certain way to get it wrong.
When setting one side to full duplex, negotiation _will_ fail, and the other device, will default to half duplex, and presto.. you have a duplex problem.
So, set the switch to half duplex - the negotiation will then fail and the device in the other end will also end up with half duplex - no duplex problem.
Besides, this is a PCMCIA card, combo 10BaseT/10Base2 - you dont see those capable of running full duplex anyhow, even exclusiv 10BaseT cards rarely do/did full duplex.
