Since I installed x3 and the update X3b my ASIO drivers aren't available anymore. I have a MOTO 896mk3. This may not be an issue caused by X3 but I've just noticed it. So, I have to use the MME or (MOTU Audio Wave) drivers and it's going insane.  The phones works sometimes, then it stops all together. In the Control Panel... also not available no asio drivers to choose from. So, I haven't a clue. However, I'd noticed something in the x3b update regarding some driver issues so I was looking forward to installing the update but to no avail. Have I missed something? The only thing I can think of to try is uninstall X3 and see if X2 works. Just not sure why my system doesn't see the asio drivers either.

Did you install as admin?
Did you reboot after the install?

Not sure, how do I install as admin? I just clicked on the install file.  I don't think I rebooted. Although I have rebooted it several times when the issue arose. I suppose I'll uninstall it..re install it.

To run as admin, RIGHT click the .exe and choose "Run As Administrator"

Right click on the inst,all or run icon for any plugins or drivers you install and select always run as admin..

Another thing to check is to make sure that windows is not using your sound card. Windows can't use ASIO drivers and will always switch back to WDM or MME.

I would also try to re-install the MOTU drivers. I had a similar issue to yours a long time ago and that fixed it. I can't remember what might have caused it tho..

ProjectM
I would also try to re-install the MOTU drivers. I had a similar issue to yours a long time ago and that fixed it. I can't remember what might have caused it tho..

+1, they have recently released some new drivers

Have you tried turning off the motu unit and then physically unplugging and replugging the USB/Firewire back to the computer? I've had my MOTU get into a permanently hosed state once that was only solved by a full reset like that. I have X3 and a MOTU and its working fine. Also check if the drivers are available in X2 or any other program under ASIO. 
As a last resort uninstall and reinstall the MOTU drivers. 

I'm guessing our man, Noel, is on track... SONAR's not seeing the drivers because Windows hasn't loaded them due to a problem with hardware connectivity/firmware/driver state. Without digging into the Windows Device Mangler, you can double-check this by firing up a standalone synth like Dim Pro or TruePianos, and seeing if ASIO drivers are available there. You'll also want to open the MOTU Audio Console (if there is one for USB interfaces...?), and make sure it's happy and I/O channels are enabled as expected.

I ran the install as admin. It didn't work. I'll take a look at a stand alone program and see if the asio driver is available. MOTO suggested that if by chance it doesn't...repair the drivers through the Windows control panel. I'll take these steps and get back.