Another task is already running

Hello,

In one of our pool a desktop is in error state. If I try to remove this desktop using the View Administration tool, i receive "another task is already running". I have also no chance to shut down the desktop using webclient of Vcenter. Any idea how I can remove this desktop, so View will recompose it? Beside the one desktop which is stuck, View composer works fine. Our desktops are configured to refresh after each session.

Thanks,

Edy