WinTV-HVR-2250 Blaster Configuration Issue

[meccano]

Is anyone using a WinTV-HVR-2250 capture card to IR blast
a DCT700 digital set top box? I use Shaw cable in Canada.

If so, can I have a copy of your HCWBlast.ini file?

Two years ago I installed a WinTV-HVR-2250 capture card
in a new computer along with Windows XP / GB-PVR. However
from day 1, I was never able to get the IR blaster to work
properly with zeros. I configured and tested the IR codes
with the Blaster Configuration program (blastcfg 7.3.28312).

I successfully used the Blaster Configuration program
"Learning Action" section to learn the digits 1-9 from my remote
control but even though the software says that I have also
successfully learned 0 (zero), the 0 will not work when it's
sent back to my DCT700 digital set top box using the Blaster
Configuration program. The problem is 100% reproducible using
blastcfg, GB-PVR is not involved.

So, for example, when I change channels to "30" I really
get "3". Or when I try "103" I get "13". I can see the digits
appearing on my TV screen, apart from the zero. In all cases,
the red light on the back of the IR blaster flashes.

The DCT700 remote control works fine with all digits so it
would appear that the problem is related to blastcfg or a faulty
IR receiver.