I hope this might be the problem....
NeoSoul, if you have your 2x2 selected to play from the computer (windows media player, youtubes, website podcasts, or whatever...) Sonar will not see the audio device. I know this as I have uninstalled/disabled all other audio drivers aside from my Forte and sometimes will forget I'd assigned it to play a mixdown thru media player or watch a web demo/youtube. When I fire up Sonar, if I haven't gone in and disabled forte from within right clicking the speaker icon, sonar says, "There are no audio devices for the current driver model on your system.....blah blah blah...
I need to close sonar, right click the speaker icon on the lower right part of the desktop, which brings up a menu, click "playback devices" and rt click the only device I have functioning (my Forte), and click "disable". This frees it up to be seen by sonar, so I can open sonar and everything opens up fine... Might wanna check to see if the 2x2 is assigned to the "record" section also in the speaker icon... and disable this.
Platinum seems to be a bit more finiky in automatically seeing the drivers in such a situation and sometimes I have to muck around. X3 automatically sees them after I've disabled them from the speaker icon...
Just to check, look to see if your 2x2 drivers are "enabled for the speaker icon...
Hope this is it...