Can't go past channel selection

I think your problem is still the ports, although 8585 should be enough to give you access to channels 1, 5, 9, 13, and 17 (at least I think so. I don't know Scania's setup, only MYCK's, but I think Eos commented on Nexon finally making their network uniform, so it should be the same).
Maple also uses 8586, 8587, 8588.

Good luck.