I'd suggest to first make sure you have the latest firmware installed for your TSU3000 and are using the latest editor. I'd then suggest that you experiment with the IR duration settings for your IR codes. The default IR duration may be the problem.

(See this post for instructions on how to adjust the IR durations for each IR code.)

You could also post a couple of the IR codes as examples. There are people here who know how to read them, and could perhaps be of assistance.