Cannot connect to wireless router

[bettynmable]

I have had my htc hero for a year and have been using our wireless router the whole time to access the internet, facebook etc. However a few days ago it stopped connecting and now it doesn't seem to be able to connect to the IP address.

I have tried connecting to our secure network and to our network without the security attached.

All to no avail.....

Anyone able to help?

Thanks