Yes, there is something wrong... you're doing it the right way... also rich editor is missing..
meanwhile you can use this workaround: click on choose file from your computer but don't hit Upload button, just save the partner.. I was able to create one this way just now.. http://web.esnoulu.org/partners/itcom-test
I'll have a look what is wrong.. but could you write us an email to [email protected], this would be way faster (I don't have your mail at the moment)
Petr