Can you post some of your source code. Its hard to diagnose via your comments above.
Here is some of my code I use to do it: http://code.google.com/p/gwt-examples/wiki/DemoGAEMultiFileBlobUpload Brandon Donnelson http://gwt-examples.googlecode.com -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-appengine-java/-/gVsUAoAPRvoJ. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.