Suddenly it stop uploading code- Arduino Upload Error

Hello I was doing some code on my arduino and checking into the serial port, I upload and check.. upload and check, but suddenly it give me the next error:

Tamaño binario del Sketch: 4,826 bytes (de un máximo de 28,672 bytes)
Found programmer: Id = "B©J"; type =
Software Version = . ; Hardware Version = .
avrdude: error: buffered memory access not supported. Maybe it isn't
a butterfly/AVR109 but a AVR910 device?

Im using in windows 7 64, and Leonardo :S
I can still be using the arduino with the last code, but cant upload any new. what can I do?

You don't change the board and/or the programmer in the IDE?

Sorry for the late some hurricane Odile broke my internet, no i dont, i can upload in other arduino leonardo but not in this one :S