still no luck with ethernet between 2 computers

[Matthias Schulz <matthschulz1@worldnet.att.net>]

Hi all,

I'm still out of luck with a ethernet-connection between 2 computers.
Here are the facts: debian 2.2 Kernel, 2.2.18, Linksys ethernetcards
(one PCI, one PCMCIA) crossover cable

I can ping each other just fine.
Same machines can telnet each other or nfs-mount directories when I use the 
plip-connection I want to get rid of. (eth down and plip up instead)

Telnet over eth just waits and times out.
Same with mount -t nfs.
route says:

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.0.0     *               255.255.255.0   U     0      0        0 eth0
~>                                                                            

ifconfig says:  

eth0      Link encap:Ethernet  HWaddr 39:48:39:48:39:48
          inet addr:192.168.0.3  Bcast:192.168.0.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:49 errors:0 dropped:0 overruns:0 frame:0
          TX packets:24 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          Interrupt:11 Base address:0x9000
 
lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:3924  Metric:1
          RX packets:28 errors:0 dropped:0 overruns:0 frame:0
          TX packets:28 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
 
~> 

Can anyone point me, where to start looking?
What is in a eth-connection involved and not in a plip?

Matth