If you look at the User's Guide, page 26, there I mention that you need to specify the context name too in the script 'src' attribute. I think you are missing this.I have tried many permutations of the following:
In the output window of app engine as well as looking at the requests in Firebug, it seems it is trying to reach back to extjs/djn/directprovider and getting (3) 404 errors.
Can anyone provide anyhelp?
Besides, the documentation in page 26 specifies that you need to set several configuration parameters. Can you check that you did that right?