tomrom one XL and omnia

[badfrog]

ok, I bought a refurbished tomtom one XL, when I first took it out of the box I was able to connect through my phone via bluetooth, then I updated the firmware on the tomtom and it gives me an error every time... someone on another forum said I needed tethering enabled, but if that is so, why did it work the first time?

when I first tried I left username and password fields blank, and it worked, now nothing works... anyone else have one of these and know anything?