Wireless connection does not resume after awaking from sleep mode

[Suture]

Brand new C2D-based iMac running Leopard. When my computer is awakened from sleep mode, it cannot find my router, and I have to manually connect every time. I am connecting via wireless to a D-Link DGL-4500 with the SSID hidden. I am on the 802.11a/n band.

I went into the network connections setup on this Mac (Advanced|Airport), and my router does show up, but I have to manually connect it every time. I've tried removing the entry and readding it, but it doesn't help.

Any thoughts?

 

[ant-macyourself]

How long do you usually give it before you manually connect? I know I have a lag on both my iMac and MacBook Pro where the wireless connection is not established for a good 30-60 seconds until after they have been woken from sleep.

 

[richard.mac]

try going to Advanced Network preferences and removing your preferred networks, deleting Airport network password from Keychain Access, rebooting and then re-connecting again.

 

[Suture]

try going to Advanced Network preferences and removing your preferred networks, deleting Airport network password from Keychain Access, rebooting and then re-connecting again.

This seems to have resolved the issue -- thanks!