How is the included "locator" datatype different from Darren's Google Maps datatype? They seem to have similar functionality but different ID's.

I ask because I'm getting an error while using it together with uComponents Datagrid Datatype. According to their compatibility sheet they should work together. But when I'm using Datagrid datatype with the Locator included in this package I'm gettint this error:

Object reference not set to an instance of an object.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error: 

Line 26:             if (!this.Page.IsPostBack)
Line 27:             {
Line 28:                 if (this._parent.Data.Value.ToString().Contains(","))
Line 29:                 {
Line 30:                     string[] coordinates = this._parent.Data.Value.ToString().Split(",".ToCharArray());

Source File: d:\Websites\demos\Nibble.Umb.Locator\Nibble.Umb.Locator\Datatypes\GoogleMapsGeocoder\GoogleMapsGeocoder.cs    Line: 28