Console not executing

[flying-squirrel]

Hey there,
i installed the plugin on my old Piwik installation. Now I wanted to migrate one of my sites (ID is 2) to the new destination. So in my SSH client I type in the following command:

./console migration:site 2 --db-prefix piwik_

The console returns the following:
Content-type: text/html

What am I doing wrong? I tried several commands but I'm always getting the same result.

[mattab]

Can you add -ddd to the console command?
Also maybe try with quotes eg. ./console migration:site 2 --db-prefix "piwik_" -ddd - what do you get?