TCAS question

[Guest Phill]

Would someone tell me the procedure for seeing multiplayers on the tcas please,,without using squawk box or vatsim.I can get it to work with the A1 planes no problem.I have had some limited success online,i do the test,then set the ta/ra ,then the tfc,rel,etc,then join a multiplayer game choosing a server from fs host,and enabling the A1bridge.What i don't understand is that if there is three or four players flying around the airport and i am on the ground and i have the tcas set to "above" i usually only see one of those players on the tcas?, and other times i am flying around and have another plane virtually next to me,but not showing up on the tcas? am i doing something wrong?.Any help regarding this would be appreciated thanks cheers phill.