When you click on the soft-delete symbol there is an error message.

Module not accessible

BACKTRACE

FILE: (not given by php)
LINE: (not given by php)
CALL: msg_handler()

FILE: [ROOT]/includes/functions_module.php
LINE: 465
CALL: trigger_error()

FILE: [ROOT]/mcp.php
LINE: 237
CALL: p_master->load_active()

You can test it here http://test.wintstar.de/viewforum.php?f=7. Click of the green icon.