I've been looking for a solution in this forum for at least a week now but still can't find one! Not sure what is exactly needed but here goes

I have a BB 8900 curve and I can't connect to Wi-Fi at home even though my laptop and my iPhone do.

the message I get is "Failed to authenticate against the network". I have typed in the password correctly and I'm sitting right next to my router.

What should I do, please help!

edit: I can post the technical stuff but not sure what is exactly needed.