diff --git a/src/mambatray b/src/mambatray
index 7ab3c57..d5efe5a 100755
--- a/src/mambatray
+++ b/src/mambatray
@@ -32,11 +32,12 @@ class SystemTrayIcon(QtGui.QSystemTrayIcon):
 		desktop_session = QtCore.QString('kde')
 
         # refresh packages cache timer
-        global refreshPackagesTimer, refreshPackagesCacheProcess, checkSRPMSUpdatesTimer, SRPMUpdateProcess
+        global refreshPackagesTimer, refreshPackagesCacheProcess, checkSRPMSUpdatesTimer, SRPMUpdateProcess, networkOnlineProcess
         refreshPackagesTimer = QtCore.QTimer(self)
 	checkSRPMSUpdatesTimer = QtCore.QTimer(self)
         refreshPackagesCacheProcess = QtCore.QProcess(self)
 	SRPMUpdateProcess = QtCore.QProcess(self)
+        networkOnlineProcess = QtCore.QProcess(self)
         self.connect(refreshPackagesTimer, SIGNAL("timeout()"), self.refreshPackagesCache)
         self.connect(refreshPackagesCacheProcess, SIGNAL("finished(int,QProcess::ExitStatus)"), self.restartRefreshPackagesTimer)
 	self.connect(checkSRPMSUpdatesTimer, SIGNAL("timeout()"), self.SRPMSCheckUpgradeList)
@@ -138,6 +139,9 @@ class SystemTrayIcon(QtGui.QSystemTrayIcon):
 	result.append(v[ v.find("for")+4 : v.find("(") ])
 	return result
 
+    def networkOnline(self):
+	return networkOnlineProcess.execute("/usr/bin/nm-online",['-q','-x'])
+
     def softwareManager(self):
 	self.setProxyForSmart()
 	if desktop_session == 'kde':
@@ -199,17 +203,18 @@ class SystemTrayIcon(QtGui.QSystemTrayIcon):
     def SRPMSCheckUpgradeList(self):
 	checkSRPMSUpdatesTimer.stop()
 	global contatore, lista, NetsrpmsArg
-	try:
-		SRPMUpdateProcess.start("/usr/bin/openmamba-netsrpms",[NetsrpmsArg,srpm[contatore]])
-	except:  #supera il limite dell'indice nella lista
-		contatore = 0
-		if NetsrpmsArg == '-c':
-			self.SRPMSAskAndInstall()
-		else:
-			lista = []
-			NetsrpmsArg = '-c'
-			checkSRPMSUpdatesTimer.start((nOre * 60) * 60000)
-		
+	if (self.networkOnline() == 0):
+		try:
+			SRPMUpdateProcess.start("/usr/bin/openmamba-netsrpms",[NetsrpmsArg,srpm[contatore]])
+		except:  #supera il limite dell'indice nella lista
+			contatore = 0
+			if NetsrpmsArg == '-c':
+				self.SRPMSAskAndInstall()
+			else:
+				lista = []
+				NetsrpmsArg = '-c'
+				checkSRPMSUpdatesTimer.start((nOre * 60) * 60000)
+
     #viene eseguita per ogni SRPM al termine del processo SRPMUpdateProcess
     def SRPMSCheckUpgrade(self, status):
 	global contatore, lista