Hello for some time I have a problem with graphs in web scenarios on Zabbix 2.2.1, I put below the screen, this problem has appeared at every graph of web scenario

This same scenario installed a second zabbixie that runs on my local virtual machine with zabbix. In my local machine all components of zabbix (server, frontend, agents), but in my production zabbix only zabbix frontend are separated from each other.

 Scenario for openerp
 ==============================

 Name: OpenERP Web Checks

 Application: 

 New application: 

 Authentication: 

 Update interval (in sec): 60

 Retries: 1

 Agent: Internet Explorer 10.0


 Steps:
 ==============================
 Name: OpenERP login page

 URL: http://openerp.test.com

 Post: 

 Variables: 

 Timeout: 15

 Required string: 

 Required status codes: 200

My zabbix server performance:

Anybody have some idea how fix it ?

Regards Mick