[Trigger] Check if file is changed in the last hour

[icetree]

Hi,

I'm trying to monitor a file with zabbix.
I want to check if the file is changed in the last hour, if not then the trigger must come in action.

I created an item that makes a checksum of the file (vfs.file.cksum).

But i am having trouble creating the proper trigger.

Does anyone know what the proper trigger is to monitor the file.

This is what i have so far, but this one does not work.

{TESTSERVER:vfs.file.cksum[c:\testfile.txt].change(0)}>0&{TESTSERVER:vfs.file.cksum[c:\testfile.txt].min(3600)}>0

[icetree]

Does any one know the correct trigger for this problem ?