Wallet xml format is some like this: <targets> <target> <id>id</id> <name>name</name> <groupName>groupName</groupName> <type>existing type</type> <image>base64-png-image</image> <backimage>base64-png-image</backimage> <field name="name1" type="T">field value1</field> <field name="name2" type="D">field value2</field> <field name="name3" type="S">field value3</field> ... <creationTime></creationTime> <modificationTime></modificationTime> </target> ... </targets> If you have problems, try to add a card into wallet, and then export to see how it is. If you don't get it, if you can provide me a sample and can try to do something.