Woah , stop a min please
for the Three way switches you should see a dark coloured screw which it called common and other two is travallers.
right now dont worry about the ground wire [ bare copper wire ] leave that aside for a min just contracted on the main wires for now.
if you are replaceing both 3 way switches at the same time.
here what you have to do here i know it will tick you off a little but bear with me there is about 9 diffrent way to get the 3 ways working right.
you have to tell me what colours the wires you got on the switchbox right there at both loacations and the numbers of cables go in the box [ this part you can tell by the groups of wire[s] at each spots normally most percentage it will be black and white but there are some wire it will have black and white and red as well.
right now the main point is find the hot lead at first which you did that is the common lead keep in your mind the common is a hot wire or a wire wil go to the light fixure
A & B always complete a circuit.
B & C complete a circuit when the switch is OFF.
B & C fail to complete a circuit when the switch is ON.
the A is common but B and C is trallver so check the other switch as well and watch the wire colour if the wire colour not match up please post it back here
that what i will suggest that make sure both switches are at the same pattern of connectons this is one way you do it right
note that there are few other guys will help you here also so bear with us they will pitch in too