iPhone 3GS running 3.1.3.
DataSync running mobility Build 41.1151

I have a problem with appointments on my iphone. I can make appointment on my iphone, it will be sync on GW, but there is non appointment made by GW on my iphone.

It seem that there is somme events waiting to sync to the iphone
The status for datasync is :

# Converted Events Waiting to Sync to Device = 30
# Device Events Sent to Sync Engine = 0
# Items Synced to Device = 1593
# Pending Events From Device = 0
# Events From Sync Engine Pending Conversion = 0
# Event Errors Syncing to Device = 0

and I have some errors :

EventID: default.pipeline1.groupwise-source-soapbridge.a84b94ac4eaa11dfb598005056825da1 | DeviceID: | ObjectID: a7cebae34eaa11dfb598005056825da1 | Class: | Action: add

{"error": "Traceback (most recent call last):\n File \"./activesync/lib/monitors/syncEngineEventMonitor.py\", line 90, in run\n File \"./activesync/lib/conv/converter.py\", line 173, in convertSEToAS\n File \"./activesync/lib/conv/se2as/convert.py\", line 65, in se2as\n File \"./activesync/lib/conv/se2as/calendar.py\", line 40, in se2as_calendar\n mdays = [0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]\n File \"./activesync/lib/conv/util.py\", line 243, in se2as_timezone\nerror: argument for 's' must be a string\n"}

Anyone can help me?

Thanks in advance