Hi there,
I tried to create the cron job as suggested by the admin screen in the plugin, but it didn't work (wget somehow didn't like the URL).
When I added double quotes around the URL, cron started working. So, you might want to update the suggested cron command to include double quotes around the url.
From:
wget http://domain.com/index.php?sc_wpfmp_scan=1&sc_wpfmp_key=ff4301e4eccb788d9c7fe25483aaa4272db8f504
To:
wget "http://domain.com/index.php?sc_wpfmp_scan=1&sc_wpfmp_key=ff4301e4eccb788d9c7fe25483aaa4272db8f504"
Hope this helps!
http://wordpress.org/extend/plugins/wordpress-file-monitor-plus/