No standby with new power supply (new MagSave Power Adapter)

Hi,
i have a Macbook Pro Early 2008 and this was shipped with the "old" MagSave power adaptor, with the white connector on the macbook side. A few mont ago the power adaptor was defect so i bought a new one in the apple store. The new one with the grey connector worked perfect for charging. But if i have connected it, the macbook pro is not able to go into standby mode. If i use the battery it worked very well. If i attached the connector, while the macbook pro is in standby the macbook will wake up and never come to standby again.
Does someone have a solution for this problem. This is a pain, because wy wife will always use the standby mode and close the macbook. After a while the macbook will be very hot.
Thanks for your help and sorry for my bad english, it is not my native language.
Cheers
Alex

You could try resetting the SMC:
http://support.apple.com/kb/HT3964?viewlocale=en_US
I've never done it, but the SMC is a piece of firmware that's responsible for (quoted from the article)
"Responding to display lid opening and closing on portable Macs"
Good luck.
Edit: it's available in German, as well:
http://support.apple.com/kb/HT3964?viewlocale=de_DE

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No standby with new power supply (new MagSave Power Adapter)

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