strange Exception

Hello, help me please. I packed my program to jar-file, but when i try to start it, i see next (strings "Driver loaded" and "Connection created" i print, when jdbc is Ok):

С:\app>java -jar app.jar

Driver loaded.

Connection created!

Uncaught error fetching image:

java.lang.NullPointerException

at sun.awt.image.URLImageSource.getConnection(URLImageSource.java:99)

at sun.awt.image.URLImageSource.getDecoder(URLImageSource.java:108)

at sun.awt.image.InputStreamImageSource.doFetch(InputStreamImageSource.j

ava:248)

at sun.awt.image.ImageFetcher.fetchloop(ImageFetcher.java:172)

at sun.awt.image.ImageFetcher.run(ImageFetcher.java:136)

[715 byte] By [NeedJavaa] at [2007-10-2 10:49:44]