port 13 not working

Hi, when I connect a LED to any port it works... except on port 13 anyone knows why this is ?

EDIT: I read that it isn't supposed to work, but I just thought I saw it work last week when I tested the chip maybe I just thought wrong.... did I ? LED blink works fine with the light built into the board.

Are you aware of the fact that 'pin 13' has an build in resitor of 1k?

What kind of led do you use?

ye I am but still it should work :stuck_out_tongue: the LED works with 2 and 3V when i use my double a batteries to power them Im using a red LED not that this is much help... I had it around so I don't really know.