X2 crashes when using Mackie Control via USB

Hi, my sonar x2 has worked with my mackie control well in the past. Now it is stable except when I run the mackie control over usb. When it crashes I close it and can't restart it. I go to task manager and there is no app running but under processes I still see SONARPDR.EXE.  I can't do an end process or end process tree on it. It stays there. But as soon as I turn off my mackie ... boom... it finally closes and disapears from processes.
 
What do you think is causing this "conflict"? How can I trouble shoot this issue?
 
Thanks for your help,
 
Kevin

Thanks Bob for the quick response!
 
OK, so I may have found the problem. Has been working fine for the afternoon so far. I disabled AVG anti virus. I was ignoring this because so many folks have said that today's anti virus programs won't interfere with Sonar. And I think I shared that experience in the past. But for me and this particular computer / project...Well for me they do interfere. So no more AVG while working in Sonar.
 
Thank you,
 
Kevin

Wow, Star Tekh, you have certainly boldly gone, etc.  :)
 
Bob Bone

Still no joy. I disabled power management of the usb ports. Sometimes, if I leave a project loaded and take a break,  when I return to the computer sonar is stuck. Until i turn off the mackie. then it works again. So i leave sonar running with a loaded project, take a break, and when i return i click to start playback and it just hangs there unti i turn off the mackie.

Kman: whats the motherboard  make and model ..

Hybrid sleep is designed primarily for desktop computers. Hybrid sleep is a combination of sleep and hibernate—it puts any open documents and programs in memory and on your hard disk, and then puts your computer into a low-power state so that you can quickly resume your work. That way, if a power failure occurs, Windows can restore your work from your hard disk. When hybrid sleep is turned on, putting your computer into sleep automatically puts your computer into hybrid sleep. Hybrid sleep is typically turned on by default on desktop computers.
 
I saw that one forum person had issues with their Western Digital Caviar green hard drive was causing streaming issues, due to the variable spin rate that those drives have.  I have not seen any confirmation of this as of yet, in other threads, but am still looking.  Typically, for computers running software such as Sonar, the faster the drives the better, so whenever possible use drives that spin at 7,200 or better.
 
Bob Bone

I'm at bios 3503. got my chipset drivers from the asus support site for my board.
 
i don't have streaming issues so much as Mackie freezing or not functioning consistently. just now my Mackie was working including transport functions. all of a sudden the transport functions have stopped working. . i can start and stop music from my computer keyboard, and i can use the faders on the Mackie, but the transport functions on the Mackie are not working.
 

Disabling power management and anti virus, and verifying/updating updating drivers,  have improved things dramatically. However, sometimes the transport buttons on the Mackie still get "stuck" , aka don't do anything. Seems if I hit spacebar on computer keyboard and play on the Mackie several times together or alternately the Mackie will sometimes start working again. Strange behavior.
 

I followed the instructions and couldn't get the update to work. I'm at 4.0.1.  I put it into the "waiting for firmware update" mode, press play and nothing happens. The mackie is supposed to display some blinking lights during the update but it just sits there with the "Waiting" message. I was on hold with Mackie for over an hour and just hung up from the torturous music loop they play.
 

No Driver Required for Supported Windows (PC..is the next thing i question.... it didn't work as advertised. The "USB only" thing just didn't work for me so I had to connect the midi cables as well and then it worked