Newbie Help! Can't upload over Graph example

Hello

Complete Arduino newbie.

I uploaded the Examples>Communication>Graph example to output data to the serial port. Great.

But now I can't upload anything else the chip such as Blink. When I plug the board in to usb and turn on Serial Monitor I can see it outputing the data, so the board appears to be working.

However when I press upload to upload a new program, it displays: Uploading to 1/O Board... Binary sketch size:896 bytes (of a 14336 byte maximum) Also displays an orange light next to TX

But then just hangs doing nothing else.

So Have I broken the Board?

BTW: I am using a relatively new Arduino Duemilanove Board.

Sounds like you are having the same problem I'm having and reported in this thread http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1273903581