Use of keys as inputs for sliding scale

Hi everyone,

I inherited an experiment where they are using a sliding scale (not the sliderule that has a dedicated widget) and using the letters 'b' and 'r' as inputs to move the cursor left and right, respectively.

br[ENTER]

Oddly, when I try to use different inputs, the ones that would be required by a SR box from an fMRI scanner, it only lets me move left, and not right.

34[ENTER]

Any thoughts?

Thank you,

Scott