Posted 01 April 2006 - 01:38 PM
There are lots of possibilities here. One - that it's correctly hooked. Plugs that are single plugs with one pin missing should be obvious. Some card readers come with individual plugs, which means that they can be mishooked.
Two - that the USB plug is actually turned on. Some computers have this option in the BIOS. Perhaps a variable number that can be turned on.
Three - that USB drivers aren't installed. Check your Device Manager (Windows Key + Pause/Break key). USB Serial Bus Controller or suchlike. Also, the card reader might show up under Disk Drives.
Also, remember to NOT use the "Safely Remove Hardware" option from the tray when taking out a card, or it will likely disable the entire set and you'll have to pull the plug and replug it. Just make sure that the device you're removing (flash card or whatever) isn't reading or writing while you remove it.