[news.eclipse.platform.rcp] RCP Application Export ...

["Daniel JANS" <djans@xxxxxxxxxxxxx>]

I have found some entry about this problem in the newsgroup but none shows 
the solution ...
I have migrated from 3 to 3.1.1 and now when i try to export my RCP 
application I got this problem ...

!MESSAGE An error occurred while automatically activating bundle Mail (5).
!STACK 0
org.osgi.framework.BundleException: The activator mail.MailPlugin for bundle 
Mail is invalid
................
Root exception:
java.lang.ClassNotFoundException: mail.MailPlugin
..................
!STACK 1
org.eclipse.core.runtime.CoreException[1]: java.lang.ClassNotFoundException: 
com.cogitosum.mail.Application


Here is my Manifest :

Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: Mail Plug-in
Bundle-SymbolicName: Mail; singleton:=true
Bundle-Version: 1.0.0
Bundle-Activator: mail.MailPlugin
Bundle-Vendor: CogitoSum
Bundle-Localization: plugin
Require-Bundle: org.eclipse.ui,
 org.eclipse.core.runtime
Eclipse-AutoStart: true
Bundle-ClassPath: .,lib/activation.jar,
 lib/commons-email-1.0.jar,
 lib/derby.jar,
 lib/derbyclient.jar,
 lib/derbynet.jar,
 lib/derbytools.jar,
 lib/imap.jar,
 lib/mail.jar,
 lib/mailapi.jar,
 lib/pop3.jar,
 lib/smtp.jar

Any Idea ????

Thanks ...
Daniel JANS.

PS : I think that this is related to OSGI ( i have tested a lot of different 
configurations .... but without success ).
Should be nice to have a full article explaining the bits and bytes of OSGI 
with Eclipse ...