Two-Gang means two switches mounted on the same switch plate - one switch for one light and the other switch for a different light.
If this is what you're trying to do then one pair of wires (Red & Black) will connect to a switch of your choice and the other pair to the other switch.
Each switch will probably have three terminal holes marked Com, L1 & L2. By convention the Red wire goes in Com and its associated Black wire into either L1 or L2 of the same switch, it really doesn't matter which.
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Two-way switching means the ability to operate One light from two different places - typically in a hallway where the landing light may be controlled from either upstairs or downstairs. At each switch position there are usually three wires - the live wire connects to the Com terminal of switch A and the L1, L2 terminals are connected by a cable-run to the L1, L2 terminals of switch B. Switch B's Com terminal is routed to the Light as Switched Live - throwing either switch will change the status of the Lamp.
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Your question does not make it clear which set up you have. And your trouble statement, "but it not working right" is somewhat unhelpful.
An electrician might be a good route to follow.
Diagrams may be found at "Wikipedia Switch" but they tend to use US terminology which can be confusing.
Take care... Good luck...
Peccavi, August 2009
