Google Map Widget Tutorial?

hi all,

i am newbie to thingworx, i have several problem using google maps widget. is there any tutorial step by step using the google map widget.

i have problem to show marker on the location.

i have created infotable which has location and the location has default value(from datashape) but when i bind the info table to gmpas, i can choose location field as location, but in runtime, there is no marker, even though show marker set to true....

i dont know if i have created wrong infotable..

if there is link step by step how to use google maps, please let me know...

thanks