Call Garmin. I've needed assistance a couple of times and when I called got a very helpful person.
Just FYI on your 255W. If it's been a while since you updated it the internal memory won't hold the updates. It requires loading the updates on a removable disc. Before loading to the disc the disc has to be formatted. Then do the updates and insert the disc into the 255. I've got a 260W on my bike and that's the process I go thru every 4 mo updates. The updating actually goes quicker loading to memory card than it did when it went directly to the GPS.