I tried the pachube example sketch (http://community.pachube.com/node/112#comment-832). When I run the sketch, I get a connection failed error in the serial monitor window. The error occurs then it tries to execute localClient.connect() function. I'm using Ethernet.h library.
I have an Arduino Duemilanove I purchased in August. The Ethernet shield is a Wiznet WIZ811MJ Rev 1.0. In the sketch I changed the mac address and the IP. I am able to successfully ping the Ethernet shield from another computer. I'm new to using an arduino and I don't know where to start for debugging this.