Have you tried unzipping it manually, to see if the archive is maybe broken (download error or some such).  The md5sum of the respective archive (which I can unzip here without problems) is 

$ md5sum Apache-Session-1.88.zip
7a191a87ab9c2f434e3691b992fa2113  Apache-Session-1.88.zip

[download]

In reply to Re: CPAN error help pls by almut
in thread CPAN error help pls by ianox

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