Ethernet shield

Hi, I use Arduino standard board 2010 version (not UNO). I connected it with USB cable to PC and PC recognize it as new device. But when I added on top Ethernet shield 2011 version and connect to PC, PC shows message unrecognizable USB device and Arduino IDE can not see it.

I'm curious maybe somebody already met with this kind of problem. Any help greatly appreciated.

Alex.

What Ethernet shield are you using? Could it be some short circuit in your board?

Ethernet Shield for Arduino R2

Alex2010: Ethernet Shield for Arduino R2

huh? What is that? And what is that Arduino R2?

But to me it could sound like a power issue... Have you tried to connect external power to it and then also connect usb?

http://www.amazon.com/gp/product/B0022TWQ22

Have you tried to connect external power to it and then also connect usb?

plus external power, now it's working.

Thanks. a lot. :)