cant get xml dom running

hi there,

   i need so help on this, which I' unsure wats going wrong.
   I've copied the files(the lib2xml files and the php_domxml.dll) to my 
windows\system32 folder.
   I also enable the entension in the php.ini file
   I'm running php 4.3.4  on my IIS 5.1 server on win xp.
   Whenever i run a php script I got this error "Unknown(): Unable to 
load dynamic library './php.domxml.dll' the specified module cannot be 
found.

Thanks for any hep is appreciated.