New calender entries disappear

I notice when I add a new calender entry it appears on my diary for a few seconds and then disappears!

I am having to go online to my google calender and add new entries there, and then hit refresh on em Client to see it appear on the client.

it seems that you are trying to upload en event to read only calendar - please check it. We would also appreciate if you could send us your GData log: Go to: Tools - Settings - Logging, check GData under the problematic account and exit the window. Try to simulate the issue and simulate the issue and send us the log using the same logging window. Thank you.