My controller works fine so it is just you just like Corrodias said.
I hope this has not been answered a dozen times, I searched and didn't find it. Can the key combos be remapped, or is there any conflict in using arrow keys for movement, as I prefer this over WASD.
Take a look at the Sandbox+ for SRTT thread in the release subforum. The OP has a link on how to edit the control tables. The same concept applies here to the SRIV version.