Felix,
I answered your question in response to your private email.
However, you did not mention that you had tried to "open" the file.
Add-ins are not supposed to be opened.

Try unchecking it in Tools | Add-ins and then closing Excel.
Reopen Excel then checkmark it again.
The Special Sort menu item should appear on the Data menu.
--
Jim Cone
San Francisco, USA
http://www.realezsites.com/bus/primitivesoftware
(Excel Add-ins / Excel Programming)



"Felix"
wrote in message
For quite some time I had an Add-In working fine, now it is gone...
It is still listed in the Tools manu and checked, but it does not open!

What do I do wrong? When looking for it, I tried to open the file, but
nothing happend.
--
Felix