MSTest fails but build continues anyway...

Hi teamcity slickers!

We've just encountered a big problem (which may be due to settings..). It's very important that the build fails if any test fails (and the corresponding setting is set), but apparently, if MSTest fails altogther, the build continues on as if there were no errors.

[14:14:29]: Step 2/4 (10s)
[14:14:29]: Using runner: MSTest
[14:14:29]: Starting: C:\TeamCity\buildAgent\plugins\dotnetPlugin\bin\JetBrains.BuildServer.NUnitLauncher.exe #TeamCityImplicit
[14:14:29]: in directory: L:\TeamCity\ePersonal\Main
[14:14:39]: Microsoft (R) Test Execution Command Line Tool Version 10.0.30319.1
[14:14:39]: Copyright (c) Microsoft Corporation. All rights reserved.
[14:14:39]:     
[14:14:39]: File "L:\TeamCity\Product\Main\Product.Test\bin\Release\Product.Test.dll" not found .
[14:14:39]: For switch syntax, type "MSTest /help"
[14:14:39]: Process exited with code 1 (Yes, that setting is also set)
[14:14:39]: Step 3/4 (1m:34s)