May i know your environment such as machine, VS environment or the other details? I tested on Windows 7 and VS2008. It runs well in FileSystem and localhost mode.

Regards,
Handy

I run it on a XP SP3 and VS 2008 SP1

Ok but could you let me know in FileSystem or localhost?

Regards,
Handy

i run it on the pc directly, so on the localhost...

It should be no issue in localhost. Are you sure it is localhost? The project also could be FileSystem when running directly from pc. If it was FileSystem, then it is known issue since ComponentDesigner in FileSystem could not access directly into CommonLibrary.

Regards,
Handy

how can i check this ?

When you running the site, it should be showing something like 'http://localhost:21xxx' (21xxx is a port). If you have something like those port, then it is FileSystem.

Regards,
Handy

http://localhost:1715/....

Hi,

Yes, that is FileSystem mode. It is known issue because it could not access into your CommonLibrary (virtual directory in IIS).

Regards,
Handy

so there will be an fix in the near future ?

Actually it has been fixed. Please ensure your IIS installation. Our CommonLibrary needs to be set as virtual directory. 

But how it works under VS 2008 without an explicite installed IIS ?

I am sorry. But maybe you missunderstood about my previous reply. The same issue has been occured  with IIS installed. The error would be occured because it could not acces into your CommonLibrary (virtual directory with IIS). This has been fixed.

If you does not install IIS, of course you would get the error because all our component designer need to be connected into CommonLibrary ( has been set as virtual directory). That's why you still need to install IIS.

Regards,
Handy