Problem with Umlaut under win32

[jasonal]

Hi,

I'm using Emacs23 under win32. LANG is ENU. When i type ae(?), oe(?), ss(?) 
or some other Umlauts with german keyboard, these letters doesn't display on 
the main buffer but in minibuffer waiting for some following type. So i have 
to type a Space and then delete the Space. It seems these Umlauts are some 
prefix commands.

But under Linux, it behaves exactly the way as expected.

Is that because windows translates the key sequences another way than unix? 
Plus, i can't also type C-@ under windows since using German keyboard i have 
to type Strg-AltGr-q, and windows won't send this key sequence.

BTW, emacs under win32 doesn't display "Gr¨¹?" correctly. If there are 2 
continued chars larger than 0x80, they can't be displayed correctly under 
windows.

any ideas?

Best regards,
Qichen