Connection lost after Airport ex update

[Mister Fisher]

Hi

I just installed the latest Airport Express update. It has closed down my network, and I can't get internet connection. I have plugged in an ethernet cable to send this message.

The machine that the airport is connected to is a pre intel mac mini. I am sending this from my imac.

I am able to see my neighbours networks on airport, but mine has disappeared, and I have three machines that usually link, but they can't see each other.

I opened airport utility (don't know what it is for really, but am just desperate) to no avail.

Can you help.

Thanks

Christine

[Satcomer]

Reset the Airport Extreme and reset up the wireless again.