I had this problem with that tv brand when I worked for Dish Network but U can try this.
Enter in the program mode at the Dish remote (press and hold the button for the device you want program) then press de power button (you'll see the device light on at the remote) then instead of put codes, just press and release the up arrow (Ch up) and keep doing that until the device turn off (have the device on before start the program mode). Then press the # key. That works to program TVs, VCRs and DVDs. I hope this help you guys.