I already pick those Indonesia NT with zoom, but still same (no adding detail)
Try it on my friends laptop (Win7) with Basecamp 4.2.4 + GMap Tool, and work fine (with a lot of detail while zooming)
[Only registered and activated users can see links. ]

Ok, i'll end here for now, so its maybe because older version of Basecamp.
Thank You Neil & Catymag