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Creative sound blaster X-FI Titanium problems? - creative drivers problem windows 7

Hello,
Need help with my Creative Sound Blaster XFI Titanium ...
I use the optical output, 5.1 system.Im home theater with DTS Encoder 5.1
Since I upgraded to Windows 7 Sometimes the sounds are coming and going.
For example, when I hear a song play for 30 seconds after half a second sound will be muted and return to the screen of my home theater system, and Linear PCM flash and will continue to play, DTS ... -taken most often when I play a video with a digital camera ...
Do not do it if you use the home theater system from other sources, such as the Xbox or the TV.
I do not think that Windows 7 is the problem, but could be wrong.

I updated the latest drivers for Win, 7 andtrying to install new ...
Someone else has these problems?