Emu XL-7 & MP-7 User's Group

I am having some serious problems using the XL-7 as my pattern 
sequencer hooked up to Cubase and was hoping someone might have an 
idea of what is going on (sorry for the long post).

First off I will recap my setup as outlined in a previous post:

In Cubase I have a template with 12 midi tracks which map to tracks 5-
16 from the XL-7. I am using the input transformer on the tracks in
Cubase so that they filter out channels not assigned for this track.  
(I'm using a Steinberg Midex8 midi interface.)

For example:
In cubase:
Midi Track 1 -> Halion channel 1 <- From XL-7 channel 5
Midi Track 2 -> Halion channel 2 <- From XL-7 channel 6
Midi Track 3 -> Halion channel 3 <- From XL-7 channel 7
Midi Track 4 -> Halion channel 4 <- From XL-7 channel 8
Midi Track 5 -> Virusb channel 1 <- From XL-7 channel 9
Midi Track 6 -> Virusb channel 2 <- From XL-7 channel 10
Midi Track 7 -> Virusb channel 3 <- From XL-7 channel 11
Midi Track 8 -> Virusb channel 4 <- From XL-7 channel 12
Midi Track 9 -> MS2000r channel 1 <- From XL-7 channel 13
Midi Track 10 -> EX5 channel 1    <- From XL-7 channel 14
Midi Track 11 -> Juno 106 channel 1 <- From XL-7 channel 15
Midi Track 12 -> Absynth2 channel 1 <- From XL-7 channel 16

Each track in the XL-7 template is storing a CC#11 controller as the 
first event so that when I save the template the channel routings are 
stored.
In the Cubase midi preferences dialog, I filter out CC##11.  I also 
filter program changes and SYSEX for both thru and record.  

Every time I use this setup, 2 problems occur at intermittent times, 
and with no obvious pattern of events:

[1] ... The Access Virus b will not make any sound.  Even doing a 
patch audition by pressing EDIT & SYNC or choosing any other patch, 
will not result in sound.  The virus has to be completely shut down 
and restarted.

[2] ... The XL-7 will completely lock-up and has to be 
restarted.  "Local" is on in the XL-7 because I use the pads to 
transmit midi to my other devices as well as internal patches.  No 
tracks in Cubase are being routed back to the XL-7 so there shouldn't 
be a midi loopback problem.  The only thing that I can see that the 
XL-7 receives from Cubase is midi clock and song pointer info.

Anything else I should look at?
Thanks for listening,
grimley