Thanks for the fast reply already,
I can't get the G-code out of the Software (mlaser), i flashed it back with there Hex-file.
It still works with mLaser but when i Connect with the universal Gcode sender, nothing much happens, I can send commands and make it to run but not very good.
It works with the Mega2560 CPU, like you linked.
I got the First gcode, that is include with the software maybe that can help.
Also the hex file in in there.