[chrisdisregard]

I recently had to re-setup my wireless network and now all of a sudden whenever my Macbook goes to sleep it disconnects from the network. Not only that but it pops up a message saying none of the preferred networks can be found. Granted I have my network set to invisible, but I thought once it had the name and password as a preferred network that didn't matter? Any ideas what's going on? The only thing I changed on my network setup was the password as far as I can recall.

I'm running a 2.16GHz C2D with 10.4.11 and using a D-Link DIR-655 Xtreme N Gigabit Router.

[ghporter]

This is probably the storied "my Mac won't reconnect when it wakes up" problem. One thing that may actually fix this is mentioned in this post. Moving System Preferences.app into the root Applications folder where it belongs seems to have fixed that user's major issues with Leopard not automatically joining his preferred networks.

Another tactic is to delete your current network location and create a new one (or just create a new one if you're using Automatic). It cleans up the potential problem with keychain entries for your network passwords, and that fixes things for a lot of people.

Good luck.