When the conveyor moves, do you see blinking lights change on the DSQ board? The changing lights mean that the board is reading the changes from the encoder. If not, look at wiring before programming.
Next, see if the counts are changing in the ICI section of the controller in robotstudio. This changing means the controller is seeing the counts from the board. If not, look to make sure your board is configured correctly.
Finally, check your counts per meter, if they aren't set up, there will be a 0 in there, which results in a 0mm change in position for every count of the encoder, which could result in the issue you're seeing.