 - Current treatment: metformin monotherapy or metformin in any combination with 1 or 2 other OADs including an insulin secretagogue sulfonylurea or glinide, dipeptidyl peptidase IV DPP-IV inhibitors, alpha-glucosidase inhibitors, thiazolidinediones TZDs all with unchanged dosing for at least 12 weeks prior to randomisation Visit 2-metformin: alone or in combination including fixed combination must be at least 1000 mg daily 