Sansa Clip 1gb wont recognize to the computer

Ive had my sansa clip 1gb for a while now and yesterday it just stop recognizing my computer. I would plug it in and it does say connected but it dosent charge and when i look for it under windows media player it keeps telling me to plug in my device when it is already in.

Try this:  takes you to a very good step by step on how to get your Clip connected.