I had this problem once. Here's what I did to fix it. Not sure what you have in Xlobby, but under 'setup' in 'File Types', make sure the command line switches (for theatertek) is set to - /AP 2 /nosplash %playlist%
(I also have all the other file types disabled...)
In the 'extension' section I have "ifo,iso,img,video_ts,vob,plt" (Your mileage may vary here depending on what you're doing with TT.)
That'll get TT setup to run right...
In Theatertek Configuration under the Audio Tab, make sure the output is set to 'SP/DIF', and Dolby/DTS Preference is set to 'DTS' There's an "Advanced" button next to that, click it and set DTS Mode to 'Data Mode'.
'course you also have to make sure you have sp/dif turned on in your computer, and you actually have a sp/dif connection...
Other than that, I don't know what the problem could be, as all Xlobby does is start Theatertek and tell it what file to play. It doesn't do anything more fancy than that... As far as TT goes...
Oh, Hi everyone... Long long long long time lurker, first time poster.