Ext triggering error

Hi,

I have a problem with my M1000 that the UCCNC get an error saying external trigger activate.
Its limit-switch and sometimes E-stop switch.

I saw somewhere that it might be noise but I don't know how to fix that.
It is grounded as per the manual with a cable to the chassis and plugged into wall socket.

Its brand new. I can start the machine. It moves to center of work piece and starts carving for 50mm then stops
due to ext trigger. I try to carve the logo. It does not matter where I start on the table. It alwys starts then it stops after this period 10 sec or so.
I managed to get maybe 5 passes the first time, but now it stops directly.
I use the UCCNC Version 1.2.111

Any ideas?