Why doesn’t my fish tank filter work?

I have a Whisper 10 Power Filter I bought about 5 weeks ago, after 4 weeks it quit working, so I changed the Bio Bag filter thing, but it still doesn’t work. When I plug it in I can hear it sucking up water, but it doesn’t get filtered and flow back out. I have a 10 gallon tank and this is annoying. Can anyone help please?