Recurrence event Google Calendar Request Failed

Question

I am working on Google Calendar Service and I have problem with "Recurrence Event". Here is my code:

And in catch I got a error message: "Request failed". I don know why because in Interface "ICalendarEvent" I have recurrence. Here is the par of code in Interface:

I am first time working with Google provider and I can say that I am a beginner :) If someone can help me please add comment. Thank you!

Answer 1

Problem is fixed. We must to send a timeZone too. enter image description here