The DNN Maps module is very simple and useful, but you may come across a problem: When you add points they are simply not added (and when you go to “data” later you see nothing on the list). This behaviour has been reported for module version 01.00.09.
The fix is very simple and I’m posting it here in order to facilitate anyone who’s been having the same problem:
Go to your DNN root folder and find
Change the return value in the mapWriteData function as follows.
And points will be added normally.
You may need to clear your browser’s cache in order to get it working.
Source: DNN Support Forums