Problems deleting eMail-Adresses

[puster]

Hi everybody,

I created a domain and in this domain I created eMail accounts. Amongs this eMails is a forwarder which I would like to turn into a normal eMail-Address. As I was attempting to delete the I got the following error-message:

Error 404!
/client/%7BMAIL_ACTION_SCRIPT%7D
File not found!

What can I do to resolve this issue?

The System is a virtual server running on Ubuntu Server 8.10

Thank you very much.