download error

[umlaut]

if I use the
http://www.lilypond.org/gnu-windows/setup.exe 

to install packages using internet all packages can be downloaded
except 

download of lilypond-1.5.68-1.tar.bz2 is incomplete 


(that is still on the same number of bytes: very short before end of 
loading) 


i can download the lilypond-1.5.68-1.tar.bz2 per ftp directly
but I don't know how to install manually 

Thanks Arne 

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