network error when download

hi all,

when i was trying to download the 32bit vista from:
http://download.windowsvista.com/pre...4/download.htm
which i got it from MS's email. i tried to use the activeX download manager,
after i select where i save the iso file, it pops up a screen and says:
"network error, cannot download. check connections, and try again", but i
dont have any connection problem. then, i tried to use firefox to download,
this time, it's the java download manager, but same thing happened to me.

ok, then nither built-in download manager works, i used my own download
manager (Flashget), this time, i got an unfinished file about 2G

well, maybe there's something wrong with my computer, i tried to use the
activex manager to download the 64bit version(i've got amd 64bit cpu), now
this time worked, no problem it reached 100%, i was quite happy for a while
until it told me the md5 check failed!

now i m really pis*ed, it just cant be my problem! so, what's wrong with
microsoft's server???

( i am in the UK, using NTL broadband, with a wireless router sharing the
connection)