Daewood 9000s5 not playing all cds

A word of caution. It bothers me that many of sites today try to sell their wares with little or no after-sales service. Many of the unlock codes I've had the misfortune of using needed different firmware versions that were never mentioned beforehand - or worse, simply didn't work at all. I tried on numerous occasions to follow up a dud code derived from a prominent site and to date, had zero response from them. I mention this only because I recently became a member of DVDEXPLODER , a website that actually produced a working code for my JVC HR-HV2! - an unlock I'd been searching for relentlessly. Although the unlock was in fact tricky to implement, the website staff helped me all the way until the player became region free. They're a great bunch of technically minded and friendly people, I assure you. Here's a link to there main page - www.dvdexploder.com. If you need some serious advice, I'd strongly advise talking to them, as they really know their stuff. 
There's a thread on on this board somewhere concerning Ebay DVD code scams that highlights the hit and run attitude of lots of sites. Once you've handed over your cash, you receive a product where 50% of the codes are useless and are laid out by a 10 year old that has difficulties giving simple instructions. Avoid Ebay at all costs, unless all you want is a list of outdated codes backed up with no customer service help by the vendor. And yes, I did give a bad review to the vendor on that occasion. 
Just to say, be careful how you handle your DVD player and use a trusted website to make the thing multi-region. I've mentioned a reputable research site here already, let's hope they can keep up the good work. 
Please excuse my rant, I've had it up to my here with poor advice and general Internet skulduggery.