the combination of user id password and extension is invalid

Hello,

My compagny use navision 4, and all weekend a synchronization is do. But today for one user, i've this error : the combination of user id password and extension is invalid (all user is local, direct in the db, not with the ad)

I've already search before do a thread, but the response for this problem is : do a single synchronization.
But in navision 4, is not exist...

I've already test to change password, right do all possible with this user, always the same error.

How do this syncro in sql command? Or other solution...like always is urgent...because is not a simple user.. ^^

Thx for your help

Regards
(sorry for my bad english )