fixed bug

ee/core/cron.py

@@ -4,6 +4,7 @@ from ee.core.logging import Log
 
 """
 Set CRON on LINUX system.
+https://pypi.python.org/pypi/python-crontab
 """
 
 class EECron():
@@ -11,10 +12,12 @@ class EECron():
         if not EEShellExec.cmd_exec(self, "crontab -l | grep -q \'{0}\'".format(cmd)):
             tab = CronTab(user=user)
             cron_job = tab.new(cmd, comment=comment)
-            cron_job.minute().on(min)
-            cron_job.hour().on(hour)
+            cron_job.minute.on(min)
+            cron_job.hour.on(hour)
             #writes to crontab
             tab.write()
             Log.debug(self, "Cron is set:\n" + tab.render())
         else:
             Log.debug(self, "Cron already exist")
+
+