Toucan: error while backup of KeePass database file

Hi Forum,

i configure my Toucan to make a backup of KeePass´s database file.
(KeePass is not started while i try to make a backup of it´s database file).

I think the problem is that Toucan thinks that the file "Database.kdb" is a folder.
Error

Error: Can not enumerate files in directory 'S:\PortableApps\KeePassPortable\Database.kdb\' (error 267: der Verzeichnisname ist ungültig.)


Translated to english: "(error 267: the folder name is invalid.)"

It would be great if someone can help me.