weblogic..servlets

[admin]

hi,i'm unable to work on weblogic and servlets.i get the following error. i'm working on default settings.i have created a servlet helloworld and registered asweblogic...... hello = ........i get the following error when i run the servlet from the browser." hello could not be resolved. a class upon which this class depends wasnot found....."weblogic.servlet.internal.servletstubimpl.prepareservlet(),weblogic.servlet.internal.servl etstubimpl.getservlet(),weblogic.servlet.internal.servletstubimpl..invoke()