MacBook not going to sleep when connected to WiFi

Hi there,
my MacBook 3,1 is not going to sleep as long as it is connected to WiFi.
It starts the process of going to sleep as my VNC connection gets dropped but it stays awake. I can easily reconnect.
Everthing else is working fine. Any suggestions?

Hello everyone,
I'm facing the same syptom. I tried many things and now havw to live with putting the MacBook to slee by hand. I had some other issues just before that:
1: The MB returned randomly from sleep while being closed. That was annoying. I think it was fixed after installing smart sleep and doing some cleanup in the preference files.
2: Then I was put "randomly" to sleep. I figured that came from overheating the processor (thus I'm gld it went to sleep). The fan speed control was set to constantly 2000 rpm. Installing fanControl helped.
3: Lid closing did not init the sleep mode and the backlight is not turning off. Niether does it wake up on opening when I put it io sleep manually (I have to press a key).
The sensor for closing the lid seems to work, if it is the same which controls the maximum brightnes of the sleep indicator light (pulsing). It is darker when the lid is closed.
I wonder if there is some settings tool.
Besides I think the issues started after the Software updates around 12th of dec. 2008, with MacOS10.5.6 and the EFI & SMC firmware updates.
I'm eager to get answers.
Kid regards, Ralf.

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