WiFi Dropping in 10.5.8

[Burning Radio]

I don't know what else to do. I've had problems arise with my WiFi connection over the past week. It just drops the internet connection every 10-15 minutes. Sometimes less. I've never had problems with WiFi for the past year, but all of a sudden I do.

To fix it temporarily, I either have to Renew the DHCP Lease or open the Network Diagnostics tool. Also, turning off Airport and turning it back on temporarily fixes it.

I've tried...Erasing the Airport preferences .plist, deleting the SystemPreferences folder, (of course rebooting after both), Changing the channel of my router, Restarting my modem/router, Making a new network location, Moving my AirPort connection to the top of my list of preferred connections, Re-installing the 10.5.8 Combo Update in Safe Mode, Using WPA2 security. I also completely reset and wiped my router.

Could it be my actual AirPort wireless card? Router Going bad?



I'm willing to update to Snow Leopard if that will fix it. But I don't want to give up yet. I really enjoy Leopard and it's Exposé.

I'll gladly provide any more information needed!

Thanks!

EDIT: I've just switched to WPA-Personal and it seems to be better!