im getting this error,
Bachir Nakad
1

Need to give permission to Asterisk Server IP in manager.conf file. You can find the file in etc/asterisk/manager.conf.
Give permission by adding, 
permit= ServerIP/255.255.255.0

you can refer for the Asterisk_ServerIP, Port, Username and password in /VtigerAsteriskConnector/conf/VtigerAsteriskConnector.properties and make sure entries in both files are same.