I am having a similar problem.
the Java console error is as follows:
network: Version checking for ../../IUScripts/ImageUploader6.jar, specified version is 6.5.6.0
basic: Added progress listener: sun.plugin.util.GrayBoxPainter$GrayBoxProgressListener@1683cc5
network: Cache entry not found [url: http://localhost/imageuploader/IUScripts/com/aurigma/imageuploader/ImageUploader.class, version: null]
network: Connecting http://localhost/imageuploader/IUScripts/com/aurigma/imageuploader/ImageUploader.class with proxy=DIRECT
network: Connecting http://localhost:80/ with proxy=DIRECT
network: Connecting http://localhost/imageuploader/IUScripts/com/aurigma/imageuploader/ImageUploader.class with cookie "EktGUID=8b8b57a7-39ab-4f56-bda2-f00990b60924; EkAnalytics=newuser; uks_viewpics=Region=Newcastle Upon Tyne"
network: Cache entry not found [url: http://localhost/imageuploader/IUScripts/com/aurigma/imageuploader/ImageUploader/class.class, version: null]
network: Connecting http://localhost/imageuploader/IUScripts/com/aurigma/imageuploader/ImageUploader/class.class with proxy=DIRECT
network: Connecting http://localhost/imageuploader/IUScripts/com/aurigma/imageuploader/ImageUploader/class.class with cookie "EktGUID=8b8b57a7-39ab-4f56-bda2-f00990b60924; EkAnalytics=newuser; uks_viewpics=Region=Newcastle Upon Tyne"
basic: load: class com.aurigma.imageuploader.ImageUploader.class not found.
load: class com.aurigma.imageuploader.ImageUploader.class not found.
java.lang.ClassNotFoundException: com.aurigma.imageuploader.ImageUploader.class
at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: open HTTP connection failed:http://localhost/imageuploader/IUScripts/com/aurigma/imageuploader/ImageUploader/class.class
at sun.plugin2.applet.Applet2ClassLoader.getBytes(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.access$000(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
... 7 more
Exception: java.lang.ClassNotFoundException: com.aurigma.imageuploader.ImageUploader.class
Any help would be greatly appreciated!