Did you try to start it from the X-Terminal Code: maemo-mapper to get some more output to debug? But also please recheck the permissions of the database file. This is my output for the directoryShould be 777, may be even as root, because of group ownership.
maemo-mapper
ls -al /home/user/MyDocs/.maps drwxrwxrwx 23 user root 16384 Sep 1 2013 . drwxrwxrwx 35 user root 16384 Apr 7 13:32 .. drwxrwxrwx 6 user root 16384 Aug 20 2013 FinnTopomaps drwxrwxrwx 3 user root 16384 Jul 29 2013 Google 8-bit drwxrwxrwx 18 user root 16384 Aug 20 2013 Google Landscape drwxrwxrwx 19 user root 16384 Aug 27 2013 Google Maps drwxrwxrwx 6 user root 16384 Jul 29 2013 Google Overlay drwxrwxrwx 14 user root 16384 Dec 31 12:42 GoogleSatellite drwxrwxrwx 12 user root 16384 Nov 7 02:56 GoogleTraffic drwxrwxrwx 22 user root 16384 Aug 19 2013 GoogleVector drwxrwxrwx 3 user root 16384 Jul 29 2013 OpenCycleMap drwxrwxrwx 22 user root 16384 Aug 7 2013 OpenStreetMap I drwxrwxrwx 5 user root 16384 Aug 4 2013 Virtual Earth drwxrwxrwx 15 user root 16384 Sep 1 2013 Virtual Earth Hybrid drwxrwxrwx 22 user root 16384 Aug 19 2013 Virtual Earth Hybrid_bak drwxrwxrwx 23 user root 16384 Apr 1 21:00 Virtual Earth Satellite drwxrwxrwx 24 user root 16384 Aug 20 2013 Virtual Earth Satellite_bak drwxrwxrwx 7 user root 16384 Aug 7 2013 Yahoo Maps drwxrwxrwx 15 user root 16384 Sep 1 2013 YandexSatellite drwxrwxrwx 7 user root 16384 Aug 4 2013 YandexSatellite_bak drwxrwxrwx 9 user root 16384 Aug 4 2013 YandexTraffic drwxrwxrwx 18 user root 16384 Aug 20 2013 kk_bak_jpeg50 -rw-r--r-- 1 user root 3072 Jun 22 2013 modrana_poi.db drwxrwxrwx 2 user root 16384 Jun 22 2013 monav_data -rw-r--r-- 1 user root 5120 Feb 20 13:15 poi.db