iTween problem - oncompleteparams

I have this function I want to pass a "false" to using oncompleteparams. I'm doing something simple wrong.

 public void DisableFreeCam(bool trueorfalse)
 {
     RightClickFreeCam.disableFreeCam = trueorfalse;
 }
 

DisableFreeCam(true) works elsewhere in the script, but this iTween code won't work:

 iTween.LookTo(Main.PLAYER, iTween.Hash("looktarget", lookToTarget.transform.position, "time", lookTime, "oncomplete", DisableFreeCam, "oncompleteparams", false ));

I get 4 errors:

• The best overloaded method match for 'iTween.Hash(params object[])' has some invalid arguments

• Argument #6' cannot convert method group' expression to type 'object'

• The best overloaded method match for 'iTween.LookTo(UnityEngine.GameObject, System.Collections.Hashtable)' has some invalid arguments

• Argument #2' cannot convert 'object' expression to type 'System.Collections.Hashtable'