Dell PR03X port replicator and DisplayPort to DVI adapter not detecting second monitor

Dell PR03X port replicator and DisplayPort to DVI adapter not detecting second monitor

I have a Dell M4400 connected to a PR03X port replicator/docking station. I use the DVI port to connect it to a first Dell 2208WFP monitor and I'm trying to use a DisplayPort-to-DVI adapter to connect it to a second Dell 2208WFP monitor.