Are you referring to using that image on your local wiki? If so, have you uploaded it locally? There's currently no (well supported and documented) way of using remote files (like from Wikipedia) on your local wiki.

alexandermrk wrote:

i tried: uploaden a image via ftp and i tried a an extern image from google... both times it didnt work... :C

Please read http://www.mediawiki.org/wiki/Help%3AImages

the most important bit: Before using images, you must configure file uploads and upload a file.

alexandermrk wrote:

but why i have to upload it? why it dont work via ftp or extern link?

For using "external" images, see http://www.mediawiki.org/wiki/Manual:$wgAllowExternalImages
But that's more dangerous, and lacks all the nice features.

alexandermrk wrote:

thy i read it^^