Previous trial account doesn't work anymore
It might be that you have to make a new account each “free trial event”. And the only way to play on his old account again is to upgrade it to a payed account. Again im not sure if this is true but it might be the problem.
Live life to express, not to impress.
Don’t strive to make your presence noticed, just make your absence felt. ~ unknown
If he has another email address it might be easier to just make a new account for this free trial? I know any help from support takes a while so he’d miss it.
The FAQ says that the previous trial accounts are eligible for this weekend too, so I think it’s not intended that he can’t log in with his old trial account.
He plans to buy GW2 by the way and he wants to upgrade his account later this year, but yeah… Making a new account just for this weekend seems like the good idea if we want to play this weekend…
Thanks for the response!