I had same problem and Nalin helped me resolve it. Here is copy and paste from his post.
Sam: I have noticed the key morphing poblem with two different clones and with 282T BIN as well. The way to get around it as follows: 1. Turn Key off 2. Turn autoroll off for everything 3. Do set default keys. 4. Go into Nagravision 2 and put in BOTH key 00 and Key 01 and SAVE. If you have DN and BEV do it for both. 5. Exit, set Keys on but leave autoroll off. 6. Go back into Nagravision 2, make sure the keys have not changed. Currently DN is morphing 5th number in Key 00. SAVE again. Exit, exit, exit. 7. Switch off at the back and switch on again. After the sytem has settled down to normal viewing for several hours, you may attempt to set the autoroll on; it is up to you.
Put 283T in your box, mine detected the 5th pair DB by it self after i installed the 283T. and when i set the default keys and let it roll, the dn pictrue came after 40% waiting for picture message, and 400% for bev.