Piwik stop of track visit

Hi to all.

My piwik installation stop of tracking new visit form two days.

Script is working, but no visit is tracked anymore!

I have 100 website tracked by the script, and all works fine.

I have already asked to my server farm, and they say don’t run any upgrade on my server.

Can anybody help me?


ps: my piwik version is 1.6

please upgrade to latest piwik version and then see if it works ?