Can't help you from what info is provided. Bottom line is that for it
to work, there must be 1 wire going from each switches' brass screw, to
the brass screw on the other switch; so that you have 2 wires running
between the switches.
These are called 'travellers', and it doesn't matter which brass screw
on one switch is hooked to which brass screw on the other switch.
Now you are left with 2 black screws, 1 on each switch. One black screw
gets hooked to hot, and the other black screw gets hooked to the light.
Finally, somewhere in either of the 2 switch boxes, or the ceiling box,
the light will get fed it's neutral. It all depends on how the wiring
Your best bet is to first identify your incoming hot/neutral, and work