According to that guide, one needs to connect the pins of a female RJ45 connector as follows:1: TD+2: TD-3: VCC4: RD+5: RD-6: GND
Now in other locations on the Internet, e.g. in the Wikipedia article on TIA/EIA-568, I find a different pinout for the RJ45 connector:1: TX+ (TD+?)2: TX- (TD-?)3: RX+ (RD+?)4: -5: RX- (RD-?)6: -
It sounds like you might be using a plain old 8P8C RJ-45 jack: it's probably a chunk of plastic with a some wires that go directly from the socket contacts to the board.