Using multiple MIDIsport 2x2's on SONAR 6

I have an older laptop that I use for gigging that runs XP.  As such, using X3 is out -- they don't even really recommend Vista.
 
I've been using a MIDIsport 2x2 with good results.  I need more ports, and rather than buying a bigger USB interface, I downloaded the M-Audio drivers (which support multiple instances of a 2x2), and added another 2x2 I had lying around as a spare, but things aren't working well:
 

• The XP Sounds and Multimedia applet shows two 2x2's, with In A, In B, Out A, and Out B for each of them.  Both interfaces are listed as working normally.
• MidiOx can see all eight ports, and access them.
• Sonar can see the four Ins, but only two Outs.  And while I can select all four Ins, they don't stay enabled after shutting down the program.

Based on this, I'm inclined to think that the driver is working OK, but Sonar isn't.  Anyone find this to work?  Is there a way I can use MidiOx (or another program) to serve as an intermediate 'MIDI driver' for Sonar?
 
Thanks in advance for any insights.
 
Regards,
-Bruce Wahler
 

Bob,
 
Thanks for the tip, but it didn't solve the problem.  I even went as far as to get rid of every MIDI device in the Registry except the GM synth, then reinstalled the 2x2 drivers.  Now I only see four MIDI devices in the Registry (mid, mid1, mid2, mid3), but the Sonar problem is the same.
 
After more experimenting, I'm convinced it's likely to be M-Audio's problem -- which is not good news, considering how old the drivers (and XP) are.  I was able to get things 'working' with Midi Ox and Midi Yoke:
 

• Sonar sees the Midi Yoke ports.  It adds a lot of new devices, but by using friendly names I can make some sense out of the mess.
• I can link the four MIDIsport Ins and four Outs in Midi Ox, and can run sequences by leaving a copy of Midi Ox open with Sonar:  Sonar creates the data stream, and Midi Ox connects the dots through Midi Yoke.
• However, when I close Midi Ox and reopen it, the symptoms are similar to Sonar.  All four MIDIsport Ins show up, re-connected as before, but only two of the Outs are pre-linked.  The other two are in the list of available ports, but not in the routing matrix; I have to manually add them back in.  Even when restoring from an .ini file, only two Outs are automatically connected.

I wasn't thrilled having to resort to three software pieces to get things to work, but even that method requires manual steps every time I use the laptop -- not to mention an occasion playback glitch when I minimize/maximize Midi Ox.  Clearly, there is something wrong with how the 2nd MIDIsport gets installed as a Windows device.  I think the problem might be that both 2x2's receive the same device/port names.  The Out list in both Control Panel and Midi Ox looks like this --
 
   MIDISPORT 2x2 Anniversary Out A
   MIDISPORT 2x2 Anniversary Out B
   MIDISPORT 2x2 Anniversary Out A
   MIDISPORT 2x2 Anniversary Out B
   Windows GM Synthesizer
 
(In Sonar, the 2nd set of Outs are missing.)  I was expecting them to install as '2x2 #1' and '2x2 #2' or something.  I notice that while M-Audio claims that their latest drivers have "multi-instance support," they offer no examples.  (Maybe they mean a 2x2 with a 4x4, or something?)
 
Oh well, I guess I need a MIDIsport 4x4 ...
 
Regards,
-BW

I hear ya, but I just got a great deal on Le Bay on a pair of 4x4's:  new for $76 each.  (A gigging MIDI band always needs a backup.)  Technically, a 2x3 interface would do me, so the 4x4 should give me some room for expansion.
 
Plus, I can be a masochist and try to connect a 2x2 and a 4x4 if I need more ports someday. 

Thanks.  I have several similar products from E-Mu, but I'm really looking for a box that can sit inside a rack somewhere.
 
Regards,
-BW