BitStream.Serialize looking for bool instead of Vector3

Hi, thanks for trying to help. Here is my code:

void OnSerializeNetworkView(BitStream stream, NetworkMessageInfo info){
Vector3 syncPosition = Vector3.zero;
if (stream.isWriting) {
syncPosition = transform.position;
stream.Serialize (ref syncPosition);
} else {
stream.Serialize (ref syncPosition);
transform.position = syncPosition;
}
}

The error I am getting is asking for a bool for stream.Serialize(ref syncPosition). Unity says it can accept a Vector3, so why is this happening?

Errors:

Assets/Scripts/scrPlayer.cs(35,32): error CS1502: The best overloaded method match for `UnityEngine.BitStream.Serialize(ref bool)' has some invalid arguments

Assets/Scripts/scrPlayer.cs(35,32): error CS1503: Argument `#1' cannot convert `UnityEngine.Vector3' expression to type `bool'