Problem with multiple Assemblies

Hello,

I have two Assemblies with tests -- say TestSuite1 and TestSuite2 --, 
residing in *different* directories in the file system.

Now I want to run the suites
* separately
* together in a single run

This works well with nunit-console.

But with nunit (the gui-runner) I'm having problems:
Running the suites separately works well.
For running both suites in a single run I prepared an NUnit-project like 
this:

<NUnitProject>
  <Settings activeconfig="Debug" />
  <Config name="Debug" binpathtype="Auto">
    <assembly path="path/to/somewhere/TestSuite1" />
    <assembly path="path/to/somewhere/else/TestSuite2" />
  </Config>
  <Config name="Release" binpathtype="Auto" />
</NUnitProject>

which I located in a directory different from the directories mentioned 
above.
Now, when I open this project, I get the following error:
"System.ApplicationException: Unable to load TestSuite1 because it is 
not under the AppBase
---> System.IO.FileNotFoundException: Could not load file or assembly 
'TestSuite1' or one of its dependencies. The system cannot find the file 
specified."

I already get this error when I try to create the project using nunit:
* File->New Project...
* Project->Add Assembly...
    * select Assembly, click open ==> error.

Regards,
  Christian


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