External Tool failure with system and external applications

Hi experts,
Autodesk gave me today this error and nothing that I know helped me to solve this error. A friend of mine recommended me this website and told me to ask the experts. Please can anyone help me please to fix this error ? What I did wrong ?
Thank you !

Revit cannot run the external application “hatch22-2012”. Contact the provide for assistance. Information they provided to Revit about thei identity: mertens3d, http://gregorymertens.com/
System.IO.FileLoadeException
Could not load file or assembly
‘file>///C:ProgramDataAutodeskRevitAddins2012hatch22-2012.dll”
Or one of its dependencies. Operation is not supported. (Exception from HRESULT: 0x80131515)
Close
