The complete answere depends on what has been previously done. I presume that your unable to print using ME21/ME22. Configuration is in the IMG under Material Mangament>Purchasing>Messages>Output control. You have different options as to what determines output. It can be as simple as document type or other combinations of document type, purchasing group, ect…. Also Forms may need to be copied in and converted to english along with other detail settings. Read the SAP documentation found on each of the subjects and follow thier advice.