Use net-snmp or some other available MIB browser (e.g. by iReasoning). You may find out that there are no data in the hrPrinterTable (OID .1.3.6.1.2.1.25.3.5).
If there are some rows, then change the OID to 1.3.6.1.2.1.25.3.5.1.1.1 (add 1 at the end). This the proper OID for the hrPrinterStatus on the first row.