Nope. Here is some additional info.
If I allow the WinMo 6.5 system lock to take over, it locks the keys every time. If I then set S2U2 to replace the WM lock, S2U2 activates even when I use the system lock button
which is correct.
So, if S2U2 IS replacing the WM lock, then I can't understand why it won't lock the keys.
Therefore, whatever manner in which S2U2 'connects' to the volume keys is not working.
Its like having two light switches to control the same light. One works and the other doesn't.
For sure, it is not the device. I have checked all the relevant settings in S2U2 that might affect the volume keys: In Call volume, Dont lock Volume Keys, Dont use Keyboard hook etc.
Out of ideas.