The program Repetier-Firmware for version 1.0.2 has installed the firmware on the kit with mega2560 + ramps 1.4, the problem is that the printer does not react when selecting a file for printing, stops the same data exchange on the connection to the Marlin firmware, the Question is how to overcome this problem. I really like Repetier-Firmware?here's a photo of how connected the connectors,the problem I have is that the printer does not read the file but sees it