I've experienced the same issue... only my game key is an original issue Platnium-DVD game-key I've had about 15 years..
if there are any DM's about... my ingame account is "Krivoklat" (as this account is) and I have created another account "Krivoklat-2" which I can log in as, and don't get booted... for some reason.
It's christmas eve here on the east-coast, and I can't hang in the game any longer for now, but I will try and log back in when I can and sit and wait... hopefully I will catch the eye of DM_Santa? **CUZIHAZCOOKEEZ*
*update* seems to be working... hmm... #notcomplaining
*UPDATE* -happened again, same char... I was stepping through 'colors' trying to customize my character appearance when the 'booting' happened. Last time (listed above) was during leveling-up... both times it seems I may have appeard "inactive" to the game engine... could that be the reason for the booting? -and if so, why does it block me from immediately logging back in and continuing?? #ThingsThatMakeYouGoHmmmm