Hi Enric,
you are trying to upgrade from 1.1 to 3.1, right?
The newer 3.1 version might need another Flash content to run on.
If you do a softboot (reset through the pin hole at the bottom side of the device), what text (white on black background) is displayed in the upper left corner?
What is the exact hardware you own?
Please tell us the Model Number (located on the sticker at the bottom side of the device).
Depending on your answers, a new FlashROM can be selected from the download area.
This has to be installed in order for GoPAL 3.1 to run on a 510T hardware.
Since I am not in this forum too often, answers will take some time (unless another kind soul jumps in...)
regards,
Klaus
... sorry, "no hablo español" ...