Arduino Leonardo upload failed

Hi everyone, I was trying to upload the Blink example to my Arduino Leonardo but i got the following error:

avrdude: error: buffered memory access not supported. Maybe it isn't
a butterfly/AVR109 but a AVR910 device?

I just read in the forums that It is a well know problem in Leonardo, I started de upload keeping pressed de reset button, just as the Arduino page says, but the problem remains.
I changed the cable and the problem still there.
Is there any other configuration step that I miss?. I'm using Windows 7 32 bit edition, the comunication is in COM7, with 9600 bauds.

Thanks in adavance for your help.