Windows 7 64 bits Registry permission error

There is a registry problems in my recently installed windows 7 64 bits.
When I try to add a 32 bits ODBC throw C:\Windows\SysWOW64\odbcad32.exe (and running as Administrator) and It throws me a "Cannot Write to registry" error.

If I enter into regedit as an administrator and if I go to any entry under the HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ODBC\ODBC.INI I get an Access Denied error. If I try to assign rights to that key, It says I don't have permission to change the permissins.

http://support.microsoft.com/kb/942976

Is that any help?