OI, boa tarde amigo, vou te passar um SCRIPT para criar o usuario RM no seu banco espero que resolvar pq sempre que Restauro uma nova base tenho que rodar esse SCRIPT.
/* 1º Parte */
SP_DROPUSER SYSDBA
GO
EXEC SP_CHANGEDBOWNER sa
GO
/* 2º Parte */
/* Criação dos usuários RM e SYSDBA */
IF NOT EXISTS(SELECT * FROM MASTER.DBO.SYSLOGINS WHERE NAME = 'rm')
CREATE LOGIN rm WITH PASSWORD = 'rm',CHECK_POLICY=OFF,DEFAULT_LANGUAGE = us_english
GO
EXEC SP_CHANGEDBOWNER rm
GO
IF NOT EXISTS(SELECT * FROM MASTER.DBO.SYSLOGINS WHERE NAME = 'sysdba')
CREATE LOGIN sysdba WITH PASSWORD = 'masterkey',CHECK_POLICY=OFF,DEFAULT_LANGUAGE = us_english
GO
sp_adduser sysdba,sysdba
GO
GRANT SELECT ON GPARAMS TO sysdba
GO
GRANT SELECT , UPDATE ON GUSUARIO TO sysdba
GO
GRANT SELECT ON GPERMIS TO sysdba
GO
GRANT SELECT ON GACESSO TO sysdba
GO
GRANT SELECT ON GSISTEMA TO sysdba
GO
GRANT SELECT ON GCOLIGADA TO sysdba
GO
GRANT SELECT ON GUSRPERFIL TO sysdba
GO
GRANT SELECT ON GSERVICO TO sysdba
GO
GRANT SELECT ON GPARAMETROSSISTEMA TO sysdba
GO
GRANT SELECT,INSERT ON GDATALOG TO sysdba
GO