Medion Akoya E1222 - Not connecting to Internt

Hi

I've had a Medion netbook for the last 6 months, connected to Wireless router and has worked perfectly. It was working fine yesterday morning, but yesterday evening, nothing happening.

Netgear router is fine as my Toshiba laptop is connecting to Internet with no problems.

There is no physical switch on the Medion to turn wireless on and off, like there is on the Toshiba. But it looks like I must have done something on Medion to switch off Wireless connectivity. I've tried FN + F1, with no luck.

Does anyone have any ideas what else I can try?

BTW it's Windows 7.

Thanks

BB