error when add item zabbix agregate

[khans]

hi!
I'm trying find the way to count total bandwidth. I upgraded to 1.5.3 but no new functions which can help me.
I tried zabbix agregate item. After submit , there is message that item is added.
And in log is:
Item Added Item [grpsum("Template_Cisco_2960","ifHCInOctets.2","las t","1"] [] Host [Switch_summary]

Regards,
Hans

[lauerdk]

Did you find a solution for this problem?