Delete File methods not working

Hi, 

I've been attempting to pass in a string to either the aqFileSystem.DeleteFile and/or aqFile.Delete methods in order to delete a single file based on the string, passed in. I am having an issue where the test runs and successfully finishes, however the file is not deleted.

If I manually take the string passed in and hard code the value for deletion, the file is deleted, I cannot see why this works with the hard coded string, but not the passed in value, see below example.

// At this point a file has been identified for deletion and we are simply creating the expected string value to pass in using the file path.
function OldLogsDelete(aFile){
  var DateTime = aqDateTime.Now();
  var DateTimeMinusXDays = aqDateTime.AddDays(DateTime, -14);
  if (aFile.DateCreated < DateTimeMinusXDays)
    {
      FilePathString = aqConvert.VarToStr(aFile.Path)
      var FilePathString = aqString.Replace(FilePathString, "\\", "\\\\");
      aFile = '"' + FilePathString + '"'
      aqFile.Delete("aFile");
      Log.Message(aFile + "deleted" );
    }

When executed, we get the below output - note this matched the expected value as per example in https://support.smartbear.com/testcomplete/docs/reference/program-objects/aqfile/delete.html:

Really struggling to see what is wrong here as if I just copy the string and paste it in the method instead of the aFile value, then it works fine.

Thanks in advance for any help/suggestion,

Tris