I am trying to wire a half hot receptacle to 2 switches on opposite walls. One switch is already wired and working with the receptacle (used 14/3 wire). The single pole switch has hot (black wire) on top, red on bottom, and neutral (white) married to other neutrals in the wall box. I have 14/3 from opposite wall already wired into the same wall box. How do I correctly wire in the wall box and to the opposite wall switch so that it can toggle receptacle on/off (note power source is at original wall box). I tried it by pigtailing reds, neutrals, and black at wall box. At the opposite wall switch I wired black on top, red on bottom and capped the neutral. This didn't work, the switches work independently of one another but will not toggle each other on/off. Thanks in advance for the help.

I am trying to wire a half hot receptacle to 2 switches on opposite walls. One switch is already wired and working with the receptacle using 14/3 cable. The single pole switch has hot (black wire) on top, red on bottom, and neutral (white) married to other neutrals in the wall box. I have a 14/3 from opposite wall already wired into the same wall box. 

How do I correctly wire in the wall box and to the opposite wall switch so that it can toggle receptacle on/off, with the power source at the original wall box? I tried it by pigtailing reds, neutrals, and black at the wall box. At the opposite wall switch I wired black on top, red on bottom and capped the neutral. This didn't work, as the switches work independently of one another but will not toggle each other on/off.