Yahoo maps in JOSM with normal user

I tried to get JOSM runing with WSM and YWMS plugin.

As a normal user (no administrative rights) the grap of a yahoo imagery stops with a 500 error message. I tried all the ways described in the wiki on error 500. Nothing solved the problem. The josmprofile exists, etc.

But when I start JOSM with an adminstrator account it works fine. I can downlaod the yahoo imagery.

Is this a known problem, or am I doing something wrong here?
How could this be solved?

Run it from the command line or bat file ( like this: ) and you should see a full java stacktrace when the imagery request fails. That might give some clues.

Guess most windows users are running with administrator privileges. Something about the link with the Yahoo downloader may require it.