Connecting Mag 254

HI! I am English but live in Turkey where we are currently using a Mag 254 to stream IPTV, which has been working well on my ADSL router over PSTN, however, we now want to change of to the “Skyfibrenet” provider, whom has provided us with the hap-lite RB941-2nd, which gives a constant 10 meg. Unfortunately the Mag does not work on the hap-lite. Problems connecting, then pixelating and freezing. Can anyone explain why this is happening and if it is resolvable, please? Cheers!!