std.net.curl problem

[adi]

hi there,
i am a newbee with d , just trying get a hold of the language, 
i've written small fragment of code that simply retrieves a page 
from a website and prints it to the console, but on compiling it 
i get the following error
http://www.digitalmars.com/ctg/optlink.html
main.obj(main)
  Error 42: Symbol Undefined 
_D3std3net4curl3FTP8__cpctorMxFKxS3std3net4curl3FTPZv
main.obj(main)
  Error 42: Symbol Undefined _D3std3net4curl3FTP11__fieldDtorMFZv
main.obj(main)
  Error 42: Symbol Undefined 
_D3std3net4curl3FTP13__T8ProtocolZ6handleMFNcNdZS3std3net4curl4Curl
main.obj(main)
  Error 42: Symbol Undefined 
_D3std3net4curl3FTP13__T8ProtocolZ9onReceiveMFNdDFAhZkZv
main.obj(main)
  Error 42: Symbol Undefined _D3std3net4curl3FTP3urlMFNdAxaZv
main.obj(main)
  Error 42: Symbol Undefined 
_D3std3net4curl13CurlException7__ClassZ
main.obj(main)
  Error 42: Symbol Undefined 
_D3std3net4curl13CurlException6__ctorMFAyaAyakC6object9ThrowableZC3std3net4curl13CurlException
main.obj(main)
  Error 42: Symbol Undefined _D3std3net4curl7__arrayZ
main.obj(main)
  Error 42: Symbol Undefined 
_D3std3net4curl3FTP13__T8ProtocolZ6onSendMFNdDFAvZkZv
main.obj(main)
  Error 42: Symbol Undefined _D3std3net4curl3FTP8encodingMFNdZAya
main.obj(main)
  Error 42: Symbol Undefined 
_D3std3net4curl4Curl3setMFE3etc1c4curl10CurlOptionlZv
main.obj(main)
  Error 42: Symbol Undefined _D3std3net4curl3FTP8encodingMFNdAyaZv
main.obj(main)
  Error 42: Symbol Undefined _D3std3net4curl3FTP7performMFZv
main.obj(main)
  Error 42: Symbol Undefined 
_D3std3net4curl4HTTP6methodMFNdE3std3net4curl4HTTP6MethodZv
main.obj(main)
  Error 42: Symbol Undefined 
_D3std3net4curl4HTTP8__cpctorMxFKxS3std3net4curl4HTTPZv
main.obj(main)
  Error 42: Symbol Undefined _D3std3net4curl4HTTP11__fieldDtorMFZv
main.obj(main)
  Error 42: Symbol Undefined _D3std3net4curl4HTTP3urlMFNdAxaZv
main.obj(main)
  Error 42: Symbol Undefined 
_D3std3net4curl4HTTP13__T8ProtocolZ9onReceiveMFNdDFAhZkZv
main.obj(main)
  Error 42: Symbol Undefined 
_D3std3net4curl4HTTP15onReceiveHeaderMFNdDFxAaxAaZvZv
main.obj(main)
  Error 42: Symbol Undefined _D3std3net4curl4HTTP7performMFZv
main.obj(main)
  Error 42: Symbol Undefined 
_D3std3net4curl4HTTP19onReceiveStatusLineMFNdDFS3std3net4curl4HTTP10StatusLineZvZv
main.obj(main)
  Error 42: Symbol Undefined 
_D3std3net4curl4HTTP13__T8ProtocolZ6onSendMFNdDFAvZkZv
main.obj(main)
  Error 42: Symbol Undefined 
_D3std3net4curl4HTTP13contentLengthMFNdkZv
main.obj(main)
  Error 42: Symbol Undefined 
_D3std3net4curl4HTTP6methodMFNdZE3std3net4curl4HTTP6Method
main.obj(main)
  Error 42: Symbol Undefined _D3std3net4curl12__ModuleInfoZ
main.obj(main)
  Error 42: Symbol Undefined 
_D3std3net4curl4HTTP6opCallFZS3std3net4curl4HTTP
main.obj(main)
  Error 42: Symbol Undefined 
_D3std3net4curl3FTP6opCallFZS3std3net4curl3FTP
main.obj(main)
  Error 42: Symbol Undefined _D3std3net4curl8isFTPUrlFAxaZb
--- errorlevel 28
can anyone please let me know what i am doing wrong