Bluetooth not working through Dell port expander

I'm running 9.2 on a Dell Inspiron 600m and I'm using a Linksys USBBT-100 bluetooth adaptor. I just got a port expander for the laptop, and have found that it somehow keeps my bluetooth adaptor from working properly. Without the port replicator, bluetooth comes up fine... with the port replicator (I've tried several different USB ports) the device shows up in lsusb, and hciconfig can see it, but lists the device as "DOWN"; hcitool dev shows nothing. I can't figure out WTF the problem is... anyone have any clues? All other USB devices work fine through the port replicator so far.