if i try to add the xfce4-mixer-plugin it does not show up in the panel

[s.a.top]

i am using xubuntu gutsy gibbon 7.10 tribe 5 with updates

if i try to add the xfce4-mixer-plugin to the panel it does not show on the panel

1. rightclick on a panel
2. click nieuw item toevoegen (this is dutch and means add new item)
3. select volumeregelaar*
4. click toevoegen (this is also dutch and means add)
5. notting happens
6. look in the process manager (xfce menu - system -process manager)
7. found a new process called ¨xfce4-mixer-plu¨ (-gin is missing ?!)
8. try to kill it
9. rightclick on the process
10. click kill
11. popup window ¨really kill the task ?¨
12. click yes
13. nothing happens

14. redo step 1-3
15. click and hold, drag and drop to the panel (tip from another user with the same problem on irc #xubuntu)
16. volumeregelaar* shows up in the panel
17. look in the process manager (xfce menu - system -process manager)
18. found a new process called ¨xfce4-mixer-plugin¨ (-gin is not missing ?!)
19. redo step 8-12
20. process is killed and volumeregelaar* is removed from the panel

*volumeregelaar: this is dutch and means the mixer plugin

conclusion

 with drag and drop it works
with clicking the add button it does not work and a wrong process/processname shows up

thanks servaas