have problems with BT business hub 5 and apple iPad

Hello,

I have a BT business hub 5 and it works find the only problem I am facing is that when using iPad upstairs find that the iPad has problems finding the router when it does find the router and it conect find that the internet is very slow webpages don't even load up have tried 3 web browsers but get the same problem.

Have re-booted the router, reset my iPad but no good.

Any help would be great.

Thanks