RegOpenKeyEx failed for windows 2000 advance server machine

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C++

Hi,

i am working in vc++.
I wrote the following code..
its working for xp and above.
but its not working for 2000 server..
can you help me..

Code:

if( RegOpenKeyEx( HKEY_LOCAL_MACHINE,
    TEXT("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall"),
    0,
    KEY_READ|KEY_WOW64_32KEY,
    &hTestKey) == ERROR_SUCCESS
    )
{
    printf("RegOpenKeyEx ---- >Success");
 
}
else
{
    printf("RegOpenKeyEx ---- >Failed %d",GetLastError());
}