Did you check out this FAQ Link and look @ tips in spreadsheet you can download from there? You may know this is here but others may not so please don't get offended if this does not give you a final answer.[Link: pronto.philips.com]
How is your extender configured in System Properties (Serial or Non-Serial). Is the Extender also configured in the Device Properties? Same extender? Are these RS-232 codes or IR codes?