Hi, I bought some Printworks Epson compatible cartridges from you a while back - but gave up trying to get them working, ended up buying the full priced ones which costed me about 70quid. The time has come again to replace them and I spotted on your todayonly page that you were stocking them again - although not PrintWorks branded. Perhaps you have a guide on how to get the compatible cartridges working? The printer is an Epson R300 - when I put the light magenta cart in (printworks) it simply refuses to go any further - saying not a genuine epson cart etc. Any tips appreciated, would hate to spend another 70quid on this printer.