Errors during cron and navigation to .../admin/settings/gmap

Hi, I've installed 6.x-1.1 several months ago and it was functioning perfectly.
In the last days I've noted strange errors occuring during cron or navigating to .../admin/settings/gmap path:

warning: parse_ini_file() has been disabled for security reasons in .../sites/all/modules/gmap/gmap_markerinfo.inc on line 40.
...
warning: Invalid argument supplied for foreach() in .../sites/all/modules/gmap/gmap_markerinfo.inc on line 57.
...
warning: Invalid argument supplied for foreach() in .../sites/all/modules/gmap/gmap_markerinfo.inc on line 109.
...
warning: Invalid argument supplied for foreach() in .../sites/all/modules/gmap/gmap_markerinfo.inc on line 137.
...

Moreover, if I navigate through the page where the map is shown, a popup gets out saying "Request for invalid marker set pink!"

What could be the cause ?
Thanks In Advance.