You have a .NET assembly that you are calling from COM. From within the Call COM action you can view and select the object, but when you save the object it fails with the following error:
The Operation failed 0x8002802b
The Call COM tool was not accepting types generated from a COM callable .NET assembly.
Builds prior to Hotfix SR 4A (Build 1084)
Apply Hotfix SR 4A (Build 1084)
Note that Hotfixes are cumulative. You should always use the latest hotfix available.