Problem with a .htaccess against hotlinking

I've made a .htaccess against hotlinking, but the server send a 500 error !


RewriteEngine On
RewriteCond %{HTTP_REFERER} !^http://www.ericfichot.webdynamit.net [NC]
RewriteCond %{HTTP_REFERER} !^http://ericfichot.webdynamit.net [NC]
RewriteCond %{HTTP_REFERER} !^http://aideinfo.eu.org [NC]
RewriteCond %{HTTP_REFERER} !^http://www.aideinfo.eu.org [NC]
RewriteCond %{HTTP_REFERER} !^http://monsite1.com [NC]

RewriteRule /* http://aideinfo.eu.org/monimage.gif [R,L]


where is the problem ?
I've replaced RewriteCond by RewirteRule, but the result is the same.

One of the examples that I have show the following

ReWriteRule \. (gif | jpg)$ - [F]

I do not know, but could it be that the / in your last line should be \

Jerry