My keyless entry doesn't work for Toyota corolla 2000 after i changed the battery of the remote.?

My keyless entry doesn't work for Toyota corolla 2000 after i changed the battery of the remote. how to program it? Please help me.My keyless entry doesn't work for Toyota corolla 2000 after i changed the battery of the remote.?Did you put the batteries in backwards? Most of those remotes have batteries in them that look like watch batteries you can easily get confused on which side is positive or negative since they aren't like AA batteries or anything. Just look for the little +and- signs and make sure they line up with the diagram on the remote.

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