TV-Browser import plugins Problem

Ich habe versucht mehrere verschiedene Plugins laut Vorschrift zu importieren, kriege aber leider immer nur diese Antwort:
Error:
Problems while reading the file
Details zeigt dann dies an:
Problems while reading the File

----- Start of stacktrace -----
java.io.StreamCorruptedException: invalid stream header
at java.io.ObjectInputStream.readStreamHeader(Unknown Source)
at java.io.ObjectInputStream.<init>(Unknown Source)
at captureplugin.utils.DeviceImportAndExport.importDe vice(DeviceImportAndExport.java:95)
at captureplugin.tabs.DevicePanel.importDevice(Device Panel.java:281)
at captureplugin.tabs.DevicePanel.access$400(DevicePa nel.java:67)
.
.
.
at java.awt.EventDispatchThread.pumpEventsForHierarch y(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
----- End of stacktrace -----

Vielen Dank im vorraus :)