When you synchronize a Microsoft Windows Mobile device with a personal computer, you receive an error message that is similar to the following:
Unable to Connect...
The problem occurs because one of the following conditions is true:
You have a version of Active Sync prior to ActiveSync 4.0 and you enabled the Use mobile schedule to sync with this PC option. Note This option has been removed from ActiveSync 4.0 and from later versions of ActiveSync.
You turn on the flight mode on the device, or you turn off the radio.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Use one of the following methods to resolve this issue:
Microsoft Windows Mobile 2003 software for Pocket PC Standard Edition, Windows Mobile 5.0 for Pocket PC, Windows Mobile 5.0 for Pocket PC Phone Edition, Windows Mobile 5.0 for Smartphones, Microsoft Pocket PC 2002 Software Standard Edition, Microsoft Windows Mobile 2003 Second Edition software for Smartphone, Microsoft Windows Mobile 2003 software for Smartphone, Microsoft ActiveSync 4.5, Windows Mobile 6.5 Standard