I am unable to turn off the reminder

[radoslavius]

Hello,

I need to consult with one thing.
When I shut off the phone call or meeting reminder and save, always set a reminder for 30 minutes. I am unable to turn off the reminder. I've made a copy of SugarCRM on another server and there it works according to my expectations. I compared setting permissions and PHP, and I found no significant differences.

SugarCRM version 5.5.2 (Build 1224)

Where could be a problem?

Thanks
Regards Radek

PS: translated from the Czech language with Google Translate

[radoslavius]

I performed a new installation on the same server, and unfortunately it also does not work correctly as it should. So error is probably in the settings of my server, but do not know what to watch.