attempt to invoke directory as script

[DMKlein]

Hi,

i have a problem running cgi-scripts under Plesk. Everytime i call a CGI like
http://domain/cgi-bin/test.cgi
i receive
The document name you requested (/cgi-bin/test.cgi) could not be found on this server

The Logfiles "say":

access:

p5b2a55dd.xxxx.net - - [04/Jun/2008:18:36:51 +0200] "GET /cgi-bin/test.cgi HTTP/1.1" 300 717 "-" "Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.8.1.7) Gecko/20070914 Firefox/2.0.0.7"

error:

[Wed Jun 04 18:36:48 2008] [error] [client 91.42.vv.xx] attempt to invoke directory as script: /var/www/vhosts/domain/cgi-bin/

Can anybody help me? I don't know what to do, CGI in general is activated in Plesk....