Problems using STDIN

I have compiled the code below into STDINTEST.EXE, and when I try to Pipe anything through it, it just siezes up. Any idea where I am going wrong?

Test it from a command line like this:
C:\Blitz\stdin> Echo Hello | stdintest.exe

*****
WARNING: This code will hang.
Run it in a command window, and you may beed to terminate the process manually
*****

Framework BRL.StandardIO

Print "POS=" + StandardIOStream.Pos()
Print "IO=" + StandardIOStream.Size()
Print "EOF=" + Eof(StandardIOStream)

While Not Eof(StandardIOStream)
Print "=='" + ReadStdin() + "'=="
Wend

Print "STDIN done"