my applet not working

when i start my applet without web start enabled. i got this error:

FileOpenService fos = null;
FileContents fc = null;
fos = (FileOpenService) ServiceManager.lookup("javax.jnlp.FileOpenService");
fc = fos.openFileDialog(null, null); <-- Error 1--> javax.jnlp.UnavailableServiceException: uninitialized

when i start it with web start enabled. error comes immediately:

Updating property file: C:\Program Files\Java\gLib\applet_JNLP_API\build\built-jar.properties
C:\Program Files\Java\gLib\applet_JNLP_API\nbproject\build-impl.xml:555: Unknown attribute [gensrcdir]
BUILD FAILED (total time: 0 seconds)

what is wrong?

"BUILD FAILED" isn't a message I would expect from trying to download an applet into a browser. Neither would I expect any of those messages, especially the ones mentioning paths on the local machine. So it appears what you were doing there was something in your IDE, and you have a problem with that instead.

OK what about first part of my question ?

FileOpenService fos = null;
FileContents fc = null;
fos = (FileOpenService) ServiceManager.lookup("javax.jnlp.FileOpenService");
fc = fos.openFileDialog(null, null); <-- Error 1--> javax.jnlp.UnavailableServiceException: uninitialized

why do i get such error? again problem with IDE?
P.s. : i added javaws.jar, jnlp.jar(with and without 2 other libs in same dir) one by one and together and tried...
All ended up with such error...

If you don't have WebStart enabled, then it's not surprising that JNLP services are not available, yes?

ok i understand. Thanks for your replies. (Paul Clapham and Ulf Dittmer)
For the second part, i send it to the ide forum when i got the answer, i will post it here..