This problem is MADDENING!

Hello, I am hoping someone here could help me and relieve my stress.  I currently use Sonar 6, and recently got a Behringer X32 compact as my new interface/console desk.  The recording aspect of things is going great, everything sounds amazing, but when I want to play back a track it doesn't always play, the cursor will glide through the track but no sound.  Every once in a while it works, it seems so random.... some days it plays immediately, some days it takes pushing play 4,5,6,7 times for actual sound.  It is incredible maddening.  My computer has the proper processing requirements, a considerable amount of RAM, and has never had problems like this before.  I have looked all over online, and even streamlined my computer even more (removing unwanted files, programs that might cause lag, took it off my home network etc...)  The problem is still happening.  It doesn't even seem to matter how many tracks are playing at once.  It could be an intricate song with 30 layers, or it could be a simple stereo pair.  The most aggravating part is how random it seems to be.  Anyone have any ideas?  The help would be greatly appreciated!

Thank If that were the case, if the computer couldn't handle it, or if the software was a bad match, it wouldn't explain why it works amazingly most of the time.  Sonar 6 is a preference for me, I understand that it is old and has it flaws, I get that, but with the proper management, skill and caretaking, most any system could be aided into work.  When the board was installed into my studio, the technician/engineer who installed it, got everything up and working in no time, and in fact the only problem in the entire chain was this random playback issue.  We got all the updated drivers, the computer itself runs smooth and fast.  I wish I could explain the randomness of this problem.  I have gone a full day with no problems, sweet speed, no lag.  Then out of the blue it just starts being a pain in the ass.  It doesn't happen all the time.  It just seems incredibly temperamental. The bare minimum is running in the background on the computer.  I have a completely updated Windows operating system, everything meets all the requirements for the x32 to be engaged with my computer.  No problems elsewhere.  Trust me, I know enough about recording and computers to have tried EVERYTHING I can think of, scoured the internet, ran this by at least a half-dozen other recording engineers who have more invested in recording than the 30 years I have been, and none of them can make any sense out of it.  They even said, try going online to a forum, because they are stumped.  At this point it is up in the air.

Thanks Kalle, to answer your question, when the silent playback is going, the meters AREN'T moving.  There are two ways I operate the playback, either with the space bar, or actually using the mouse manually on the screen, both are random.  And both of those functions worked before adapting to this new x32 compact.  Never had these problems before that, and I was running the most primitive home situation before for ****s and giggles.
 
I know, this whole thing is so strange.  WE HAVE GHOSTS IN THE MACHINE!
hahahhaha

Thanks Brundlefly, Yes I am using ASIO driver mode, it is the most efficient way to go. To answer the other part of your post.  The guy that hooked it up has almost 40 years in recording knowledge, and runs a premier studio here in my area.  I trust his judgment fully and he has rifled through a million ideas on that front, everything is A-OK in his book.  He is just as baffled as me when it comes to this playback issue.  We are all pulling out our hair.
 

Good idea to test the X3 demo, if only to see whether it resolves the issue.
 
Incidentally, I had a longstanding issue with outputs going silent on my E-MU 1820m after rewind from Record mode. It showed up around 8.5.3, and did not go away until the E-MU died and I replaced it with a MOTU. The workaround was to bind W to be "Go to Start" instead of the default RTZ - some subtle difference was resetting the driver in a bad way when RTX was executed.
 
E-MU drivers were always a little flaky in various respects with different problem arising as I migrated to x64 and then Win7, so I never really held it against the Bakers though it was clearly precipitated by a SONAR update when no other changes had occurred.
 
Sometimes all the layers just don't play nice together, and the further the pieces get from each other in age, the more likely it is that you get weird issues cropping up, including that it works wonderfully... 92.3% of the time. 

And again it could be a driver problem with the mouse also. And perhaps other drivers problems if not setting the software to be ran in a compability mode (which does not guarantee any thing either sometimes).