"PfCreateInterface" It does not work on Windows7-64bit ?

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Windows

Win7

if ((dwLastErrorCode = PfCreateInterface(
      1, 
      PF_ACTION_FORWARD, 
      PF_ACTION_FORWARD, 
      FALSE,
      TRUE,
      &hInterface )) != NO_ERROR) 
 {

      return ; (<<-- stop here)

 }

Hi,

I tried compiling as noted above to block or allow the packets on Win7-64bit .
But It does stop with no error .

Any ideas on how to solve it ?

Kindly help me.