Asterisk Calendars

I have setup asterisk to read my gmail calendar and its able to read my events, i can see them on asterisk cli.However i don’t get the notifications ringing on my phone except if i reload asterisk or the module.
Is there a way to configure asterisk to send a notification(that is ringing my sip phone) only once 10 minutes before the scheduled event also without having to reload asterisk ?
I used the below example configs.

[calendar_joe]
type = ical
url = https://example.com/home/jdoe/Calendar
user = jdoe
secret = mysecret
refresh = 15
timeframe = 600
autoreminder = 10
channel = SIP/joe
context = calendar_event_notify
extension = s
waittime = 30

Hello,

try with:

refresh = 9

HI
I have tried with refresh = 9, i still get the same, my setup is as below:

sakhi*CLI> calendar show calendar gcall
Name : gcall
Notify channel : SIP/2000
Notify context :
Notify extension :
Notify applicatio : Playback
Notify appdata : tt-monkeys
Refresh time : 9
Timeframe : 60
Autoreminder : 0
Events

Summary : Busy
Description :
Organizer :
Location :
Categories :
Priority : 0
UID : 2fh0fn8oc75pcc37mcagosffefgtp65b@google.com
Start : 2017-09-11 04:15:00 PM +1000
End : 2017-09-11 05:15:00 PM +1000