Executing jar file does not work

i am using net beans 4.1, jdk 1.4.2_09 and jre 5.0 update 4.
i create a jar in netbeans, exit netbeans, go to the directory where the jar has been placed and double click the jar file to run it. when i do so i get an hour glass momentarily and then nothing. the program does not execute. i hope i am not missing something very basic here. i assume i can run the program by double clicking the jar file ....
i have checked in netbeans to insure that all classes are in the jar, the manifest looks good, etc, etc. it looks like all the pieces of the jar are in place but the program will not run. please help.
thanks,
dave ...

Directory of C:\JAVA\PROJECTS\DIST
10/04/2005 10:09 AM <DIR> .
10/04/2005 10:09 AM <DIR> ..
10/04/2005 10:09 AM 25,203 gift_email.jar
1 File(s) 25,203 bytes
2 Dir(s) 124,456,144,896 bytes free
C:\JAVA\PROJECTS\DIST>echo %CLASSPATH%
c:\java\projects\dist;c:\Program Files\netbeans-4.1\ide5\modules\ext
C:\JAVA\PROJECTS\DIST>java -jar gift_email.jar
Exception in thread "main" java.lang.NoClassDefFoundError: org/netbeans/lib/awtextra/AbsoluteLayout
at giftrecpt.email.gift_email_gui.initComponents(gift_email_gui.java:38)
at giftrecpt.email.gift_email_gui.<init>(gift_email_gui.java:24)
at giftrecpt.email.gift_email_gui.main(gift_email_gui.java:142)
C:\JAVA\PROJECTS\DIST>
i added the location of the absolutelayout method to the classpath but still get the error. i also included this same reference in netbeans to the project under run-time libraries. so it seems that i have added the necesary references but still no luck. what could i be missing? the manifest makes no mention of class path. here it is below:
Manifest-Version: 1.0
Ant-Version: Apache Ant 1.6.2
Created-By: 1.4.2_09-b05 (Sun Microsystems Inc.)
Main-Class: giftrecpt.email.gift_email_gui
X-COMMENT: Main-Class will be added automatically by build
thanks,
dave ...

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