iphone 4 wifi issues on work network I'm having problems connecting the the work wifi network.

When I go to Settings the network name is listed under Wi-Fi

However the "network" logo in the top bar shows 3G not the signal strength.  If I look at Settings > Wi-Fi there is a "spinner" next to the network name.

Clicking "Forget this Network" and reselecting prompts for the password, and does not reject it - taking you back to the first situation.

I have done a hard reset, reset Network Settings, rebooted the Wi-Fi router, everything short of a reset of the phone.  I've even looked to see if the router has any blacklists set.

Other people in the office are connecting to the Wi-Fi with no problems, on the same spec iPhones, as well as laptops etc.

My iPhone has no problems joining any other networks.

Any ideas?
Looks like the issue was with the Router.

Finally managed to persuade the guys here to rebuild the router and lo and behold I can connect again...