@george59
One of 2 possibilities:
1. You have a locked img. Run gimgunlock on it.
2. You have not placed the img file correctly. For 1xxx series in microSD, it can either go in a root folder Garmin, named as gmapsupp.img only, or it can go in a root folder Map as 'anyname'.img e.g. TSM_NT_2012.30.img or any other name within reason using latin letters..



Likes: 

![Thailand StreetMap v2012.30 NT [Dual]](http://i.imgur.com/88LahVU.png)
![Thailand StreetMap v2012.30 NT [Dual]](https://www.gpspower.net/images/ranks/Medals/52_50377.gif)
![Thailand StreetMap v2012.30 NT [Dual]](https://www.gpspower.net/images/ranks/Medals/52_50358.gif)
![Thailand StreetMap v2012.30 NT [Dual]](https://www.gpspower.net/images/ranks/Medals/piaoliang12.gif)

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