Thanks Thorsten, I was able to patch the file , but now is going crazier: If I compare your hex file , with the one I uploaded from the pic is everything the same besides: YOUR HEX FILE 200000 00 00 00 00 00 00 01 00 300000 FF FE FF FF FF FF FB FF FF FF FF FF FF FF MY HEX UPLOAD (FROM THE 18F452) NO ADRES 200000 300000 00 26 0F 00 01 81 00 0F C0 0F E0 0F 40 Al the rest is the same Do I have a wiring prob, or what?