An error occurred while launching/running the application.
Vendor: Random Industries
Category: Security Error
Unsigned application requesting unrestricted access to system
Unsigned resource: http:
You must sign your jar file to prove your identity before you can go asking for all permissions, and even then, the user will be warned with a heinous message claiming death and destruction awaits.
Think about it: your JNLP link there could just start doing a recursive delete of all the files in C:\ - yikes.