DLL Injection using AppInit_DLLs on vista and win7 ?

DLLs listed under the registry key
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows\
AppInit_DLLs
will be loaded into every process that links to User32.dll as that DLL attaches itself to the process.

works Fine with windows xp.
but not working on vista and win7

i also took help from bill gates..:)

LoadAppInit_DLLs
(REG_DWORD)   
Value that globally enables or disables AppInit_DLLs.
0x0 – AppInit_DLLs are disabled.
0x1 – AppInit_DLLs are enabled.

AppInit_DLLs
(REG_SZ)    Space -or comma-delimited list of DLLs to load. The complete path to the DLL should be specified by using short file names.
C:\PROGRA~1\Test\Test.dll

RequireSignedAppInit_DLLs
(REG_DWORD)    Require code-signed DLLs.
0x0 – Load any DLLs.
0x1 – Load only code-signed DLLs.

these registry keys need to change for Dll injection on vista and win7
but not success

i build my dll on windows xp 32 bit machine.will that be problem when i use it on vista.