Ok, I recently had a little remodeling work done to fix an old bathroom into a den. I had the carpenter install a dimmer switch that was to control some track lighting that I installed later. My problem is, the dimmer switch doesn't work properly. When you turn the switch ON, the light it is already at its brightest state and does not change even when rotating the dial. There are only two wires coming from the switch, both being black. Is it possible they are wired backwards? Or do I possibly have a bad switch here? Thanks in advance for any info provided.