Is that just cable only or sat aswell. The custommix won't work with Ireland so go in the Dsayers Custommix blue button to delete file then turn autofectch to no. Ensure that you have set-up tuner configuration to Ireland I think it's Ireland brute force
So just another thing in your post you say to use an adapter like in picture. But I bought from a shop the cable in second picture would this maybe be affecting the signal and agc? Maybe it's a poor cable?
42753 is what I set mine as it was the only one I could find. Could this be a problem about the signal if so? As when I scan the channels directly to my Tv without the Zgemma it installs 200scrambled channels