Database authentication failed after reboot

Dear all,
I’ve database authentication and everything run ok but if I stop/restart web server/gateway, or reboot PC, I must login how “admin” to web page or designer.
The only way to solve that is re-save (without change nothing) user profile “default”.
This profile is saved whit “failover source” and “failover mode” link my database authentication.
Any suggest to solve it?