Dear manudea:
    I had added  "using Esperantus;" to calandar module. There weren't the compiler's error. But , when I use calendar module, the error happened.
   " http://localhost/Rainbow/go/Rainbow/3328/en-US/DesktopDefault.aspx" cann't found......
    How to process this problem?
    Sincerely yours
    Jiangws