iBook G4 can't recharge Battery while asleep?

My problem with a G4 iBook is, that I can't load the battery while lid closed.
Harald Schober wrote on :

Hi.

My problem with a G4 iBook is, that I can't load the battery while lid closed. When I shut down the computer it is possible. But in suspend mode the machine loops in a reboot / fall asleep mode.

Yet I found no solutions. I don't even know whether it's the iBook or OS X Panther.

Greetings Harald