Verified answer

Windows aint a cell phone! The adpater is meant to fit a phone!

so you have your mini sd inside an adapter and that is plugged into the slot? Make sure all are inserted correctly and fully and ensure that the connectors are clean. Sometimes they can come with a protecting cover or coat. Insert both into and out of each other a few times then secure the connection.

Are you sure the card is working correctly? it may not be. There are several circuits in these small devices and if say the one that records is working properly your photos will be recorded. However if the one that uploads to computers is not working, a computer won't see the card. My recommendation would be a usb card reader. If a reader won't see the card then it's bad. Time to trash and replace because if that circuit is gone your photos are gone too.

Check to make sure it recognises a different card.

Sounds like the slot is faulty or more likely the drivers are not loaded.

Check device manager for any problems, it will most likely be listed under USB devices as well.

I have one of these and it works fine in my laptop.

Try Re-Formatting It

(But You'll Lose All Data Stored In It)

along with your new cell phone you should have a software CD with it, find that CD and install it, that would solve your problem