[BornaE]

Welcome to CD!
This question has been asked multiple times and answered both here and on FIRST Forums at forums.usfirst.com
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anyways you have to put a jumper on the analog break out on slot 1(closes to the Ethernet ports) on the cRio
the jumper goes on the 3 pin connector separated from the rest of the connectors and th jumper connect the 2 pins closest to the outer edge of the cRio