Hello, everyone. I've searched the forum but didn't found anything like that, so I'll describe the problem:
I'm trying to use the WIZnet W5100 Ethernet shield, but every single time I reconnect the Arduino + shield on my laptop, COM4 (which is being used to upload Arduino sketches) simply vanish. Tried to reset it to solve, no success. If I detach the shield, COM4 comes back from the dead.
I'm using an Arduino Duemilanove with ATMega 328, I've bought the shield last year (only now I had time to play with it), my laptop is running Win7 x64 and I'm using Arduino 1.0.
Don't know what else I may do.
PS: And I didn't even tried to use the SD Card yet...