Bug or Am I doing something wrong ?

Error 13 The namespace or module 'BModel' is not defined
Error 12 The namespace or module 'Connector' is not defined
Error 11 The namespace or module 'Work' is not defined
But compiling with it…
command line :
C:\Program Files\Microsoft F#\v4.0\fsc.exe -o:obj\Debug\TCPBattle.dll -g --debug:full --noframework --define:DEBUG --define:TRACE --doc:D:\opc_boi\trunk\Debug\TCPBattle.XML --optimize+ --tailcalls- -r:"C:\Program Files\FSharp-2.0.0.0\v4.0\bin\FSharp.Core.dll" -r:"C:\Program Files\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.0\mscorlib.dll" -r:"C:\Program Files\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.0\System.Core.dll" -r:"C:\Program Files\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.0\System.dll" -r:"C:\Program Files\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.0\System.Numerics.dll" --target:library --warn:3 --warnaserror:76 --vserrors --LCID:1033 --utf8output --fullpaths --flaterrors "C:\Users\Username\AppData\Local\Temp\.NETFramework,Version=v4.0.AssemblyAttributes.fs" Hex.fs Model.fs DeviceModel.fs Native.fs C.fs Core.fs Connector.fs Work.fs Battle.fs
BOIConnector -> D:\opc_boi\trunk\Debug\TCPBattle.dll
I found what caused such trouble. And there is same error on VS2010
this :
Japanese comments breaks IntelliSense.