Java: Packaging Self-running Jar

I'm trying to package my Java app into self-running jar file. But it always says "Could not find the main class." If you could take a look of the process and tell me what I did wrong, that would be greatly appreciated.

Files structure:

Code:

---

manifest.mf
TaskManager/
    data.xml
    bin/
        TaskManagerFrame.class
        Task.class
        Organizer.class
    doc/
    images/
        delete-task.png
        new-task.png
        print.png
    src/
        TaskManagerFrame.java
        Task.java
        Organizer.java

---

The main method is in TaskManagerFrame, and the content of manifest.mf is the following.

Code:

---

Manifest-Version: 1.0
Class-Path: TaskManager/bin/
Main-Class: TaskManager/bin/TaskManagerFrame

---

The command to produce the jar file follows.

Code:

---

jar cmvf manifest.mf taskmanager.jar TaskManager

---

The jar file is produced, but when double-clicked, it says "Could not find the main class."

shouldn't be
Main-Class: TaskManager.bin.TaskManagerFrame
like a import directive ??
but TaskManager.bin are interpreted as packages so you can try also
Main-Class: TaskManagerFrame

In any case, first of all the manifest.mf file must be inside meta-inf/ directory

extra: a jar file is a zip file
And I don't work with java for some long time...