Problem with new bootloader on old arduino duemi

I'm talking about Duemilanove. I put the bootloader (for UNO) that I found in the IDE 21 but I tried and optiv3. When powered from the external power LED PWR lights but the AVR will not boot. Trends in 3v and 5v Pin is OK. With USB works, however, and there is a strange behavior. Sometimes when uploading the Sketch and run when I remove the USB and put it back, it seems the AVR have no Sketch .. strange. (Not all the time .. i thing 1 or 2 times did this).

So I decided to downgrade to the old bootloader that everything is working well.