w5100 IC pin connections are ok, however i can not see all the connections, the PoE module is right on top of it.
but happening it 2 devices is kind of odd and seems less probable.
can it be a problem with the Ethernet library? can you suggest some alternative library i can use for testing it. maybe an earlier version of Ethernet library.
An earlier version? Not a good idea. Versions prior to v1.0.1 had this bug:
http://code.google.com/p/arduino/issues/detail?id=605
I downloaded my version from the arduino site, unpacked it in a local directory, and ran the shell script there. I had to add dialout to my user, but that was it.
Don't move the arduino shell script. Guranteed fail if you do. It must run in the directory in which it was unpacked.
edit: So you have two of those shields and they both are assembled with the incorrect components? And neither work? Hmmm....
well interesting development now! :). i was just going to pack these for return to sparkfun. and what i found is that these are different model than i required and ordered.
the one i have got is Arduino Ethernet with PoE - DEV-11361 - SparkFun Electronics price:$80
the one i wanted is Arduino Ethernet Shield with PoE Module - DEV-11230 - SparkFun Electronics price: $60
the one i have actually are complete arduino development boards with Ethernet jack (RJ45). i don't need a separate Arduino mega. i can burn my code on these devices but need FDTI breakout to do that.
so now i'm looking for FDTI breakout or someway to burn the program code- some other way so i don't spend on FDTI breakout. i don't know much about this but will be giving it another shot soon. i would appreciate any guidance or tips for this though.
Thanks,
Ooops! That explains the ICSP pins on the top rather than a socket on the bottom. I should have noticed the power jack. That should have been the giveaway that it was an Arduino Ethernet, not an ethernet shield.
qualcuno mi potrebbe inviare il codice per controllare tutti i pin di un arduino mega attraverso ethernet shield grazie 
someone could send me the code to check all the pins of an Arduino Mega via ethernet shield thanks