Recent Amazon Issues
Amazon has had several issues lately, which should be solved in the latest version of Packing Partner. The latest version is still being tested and development finished, but it doesn't have any major issues.
It can be downloaded here
The issues the latest version covers are:
Amazon logging out during collection
Can't collect from order details page
Problems with collecting incorrect variation
Not updating all orders (this may still have issues)
You will need to create and enter credentials to use Amazon MWS.
Please see here, for help on this.