Hi Chaps,
Just thought I may be able to help someone.
Had the above problem yesterday and today disassembled the connector.
Behind the three pinned plastic claw there was no "c" shaped retainer even though I laid my guitar on a light towel so as to spot it easily when it dropped out! The plastic Ethernet clips these days seem to be pre-broken off so as not to cause the plug to stick in the Variax socket - woundrous technological manufacturing innovation.
The plug was still stuck fast!!
I then depressed the button (thin piece of tin can!) fully and pulled the unthreaded part of the casing with my thin nose pliers. Still no joy, BUT, with a little wiggle of the plug body up towards the jack socket - BINGO!
I then did what I should have done in the first place; picked up a rubber dishwasher glove for better grip and practised the same manoeuvre by hand. Thinking about it, I had the same problem with another cable when updating the firmware two years ago but then a firm tug sorted it.
Just bought a second hand Vetta combo. The sockets and release buttons on there are a lot more solid thank goodness. just praying now for a lack of electronic problems which will brick my new acquisition. Out with the midi cables later to enter some decent patches for my covers.
Happy playing,
Mike.