Wifi Dropping out & not recognising Hub password.

OS X Yosemite
Version 10.10.2
MacBook Pro
Processor 2.4 GHz Intel Core i5
Memory 4GB 1067 MHz DDR3
Graphics NVIDIA GeForce GT 330M 256 MB
Hi,
On my MacBook Pro the wifi keeps dropping out, and when I click the relevant Hub, in My case its a BT Home Hub 5 (Bt Infinity), It asks for the Hub password again, even though it's suppose to remember it, but I put in the right password, for it and it tells me that it's Invalid.  This happened a little bit with 10.10.1 and I know Apple addressed the problem in the update into Yosemite 10.10.2 but since I installed it, it has got worse.  In the past hour I've tried to reconnect no less than 40 times, with it telling me the same thing over and over saying that the password is invalid.
Previous steps tried:
Turning wifi off on MacBook for 30 Seconds - 1 Minute
Forgetting the Hub and reconnecting to it.
Resetting the Hub
Restarting MacBook
Punching MacBook
None of Which have worked yet, if anyone has any solutions, could you help me out because I don't know what else to try.
Adam.

Yes, it could be the home hub 2.
See Reported problems with the Home Hub 2.0
There are some useful help pages here, for BT Broadband customers only, on my personal website.
BT Broadband customers - help with broadband, WiFi, networking, e-mail and phones.

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