Just bought a Spectrum Climax, DCC & Sound.  Cannot change the decoder address.   When I attempt to change the address, the message on the throttle said "no d" the engine still ran only when the throttle was set to locomotive #03.  I have tried all four programming modes without success.  I can change other CV's. 

Need some suggestions on programming a new address.

My new Alco 260, with sound value decoder, runs at full speed - always!  Worked OK last week when I bought it.  Worked OK last week when I programmed the decoder.  Originally I programmed CV29 = 34, CV3&4 = 2 and address 46.  Worked OK after it was programmed orignally.  Today, I dialed in the address and it took off at full speed.  I had no control.  So, I reprogrammed CV29 = 38 and tried it on my DC test track.  Same thing, full speed.  One more thing, I also tried programming the address as a 2 digit address - same result.  Anybody have a suggestion?