When I use the other key, form the guy that i bought the punto mk1 sole, the keycode light on the dashboard is turned On, while i drive, and trust me i drive the thing, and i got no probles while i drive the car... and if i use the other key the keycode light on the dashboard is off... Whats the bloody problem? and whats the diffrence?

I don't have Punto schematics to check where the key code light is driven from but it is most probably driven from the key code unit. This would suggest to me that your engine ECU has been flashed to bypass the immobiliser function.

One way to prove this is to wrap the body of your 'good' key in tin foil. This key should now turn the key code light on as well. If the car starts then I guess your ECU has been flashed to no longer worry about the correct key code.