telnet session closed (automatically)

OMFG....just when I thought I understood a tiny little bit how it works...

I had to reflash OpenPli 6.1, which went fine.

Then my back up did not have the iptv player from SamSamSam installed,

so I decided to re-install that with telnet (iMac High Sierra 10.13.2) through the program iDreamX.

This has always worked fine until now but..

When I start a telnet session, it immediately closes.

I tried to go back to OP6.0 but that gives me the same closed telnet session.

Anyone that can advise me how to solve this?

Is there another way to re-install Samx3's iptvplayer?