Can't find my wireless network

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Hi

I am using Edimax EW-7206APg, firmware version 1.26

Broadcast ESSID: Enabled MAC Filtering: Disabled Static IP network Running mode: AP Security: WPA2 AES

It has been working since I bought it six months ago. But today suddenly I can't see my network at all. I am using the Ralink client utility. I can access the wireless router web interface via wired station and everything seems to be up and running.

Could anyone give me some tips as to how to troubleshoot and resolve this?

Thanks Yousaf