Error CS0234.......gmcs.exe failed


i’m running OpenSuse 11.1 and will install a OpenSim.
But i have a Big Problem:

             [echo] Build Directory is /opt/opensim/OpenSim/Region/ScriptEngine/Shared/CodeTools/bin/Debug
            [mkdir] Creating directory '/opt/opensim/OpenSim/Region/ScriptEngine/Shared/CodeTools/bin/Debug'.
              [csc] Compiling 8 files to '/opt/opensim/OpenSim/Region/ScriptEngine/Shared/CodeTools/bin/Debug/OpenSim.Region.ScriptEngine.Shared.C                                   odeTools.dll'.
              [csc] /opt/opensim/OpenSim/Region/ScriptEngine/Shared/CodeTools/Compiler.cs(35,17): error CS0234: The type or namespace name `JScrip                                   t' does not exist in the namespace `Microsoft'. Are you missing an assembly reference?
              [csc] Compilation failed: 1 error(s), 0 warnings

        BUILD FAILED - 0 non-fatal error(s), 1 warning(s)

        External Program Failed: /usr/lib/mono/2.0/gmcs.exe (return code was 1)

        Total time: 0.9 seconds.

Where can help me?
Sorry for my bad english.