Epson WF-7720 Ink Maintenance Box Problem

[Bezutnik 0]

Hi Guys;
I am a newbie and after 2 years of run with my chipless CISS solution i run to a problem.
After countless of head cleaning my Ink Maintenance box finally gace up.
I am ordering bunch of T6711 Ink Maintenance Tank Box from Amazon but i can not get it working.
Finally ordered an original from amazon and working. Can this be something to do with the chip situation.
Any workarounds?