Erron on "Create new Vault"

So... i have this error when i create a new vault,

STEP: select DB

STEP: insert username and password

STEP: Could not connect to the server "server name"

Doesn't matter with SQL server or windows server i use, (already tested with MS SQL 2005, 2008, 2008 R2), actually using MS SQL SERVER 2005

And i dont found anything to help with that! Anyone knows how can i resolve that?

Already maded this without sucess:

Tried to change sa for another login with db_owner

installed ALL SP for Windows and SQL Server avaible,

Firewall OFF

EPDM Database Server user changed...

I realy dont know, what i can do for resolve this problem... I will aprecciate if anyone help-me to solve..

Thks!!!

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