Box does not accept 11, 22, 33 etc.

I am using Mediaportal and have changed my digital TV box to a Pace DCR6230.
USBUIRT used to work perfectly with my old box. After learning my new remote's IR codes which worked perfectly, I realised that the box does not accept numbers which contain the same digit twice after each other (11, 22, ..., 110, 111, 122 etc.
I have tried several different settings (changed ms between digits, repeat counts etc.) without success. The same issues appears with the Hauppage IR blaster, btw.
Do you have any suggestions about what I could do?
Thx a lot, G.
USBUIRT used to work perfectly with my old box. After learning my new remote's IR codes which worked perfectly, I realised that the box does not accept numbers which contain the same digit twice after each other (11, 22, ..., 110, 111, 122 etc.
I have tried several different settings (changed ms between digits, repeat counts etc.) without success. The same issues appears with the Hauppage IR blaster, btw.
Do you have any suggestions about what I could do?
Thx a lot, G.