openatsoftwarev2.30 installation

hai i am chandra. i downloaded open at softwarev2.30
from wavecom website.but at the time of installation
it shows below message

“The archive is either in unknown format or damaged
Cannot open C:\Documents and Settings\ASIS1\Desktop\chandrababu\wavecomopenatsoftwarev2.30\Wavecom Open AT Software Suite v2.30.exe”

and again at the time of extracting the file it shows below mwssage

" ! C:\Documents and Settings\ASIS1\Desktop\chandrababu\wavecomopenatsoftwarev2.30\Wavecom Open AT Software Suite v2.30.exe: The archive is either in unknown format or damaged "
i tried so many times (i.e many times downloaded and installed) but i got same error.
pls help me.

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