putty에서 gnuboard4.utf8.tgz 압축 풀기를 하는데 자꾸만 에러가 나네요



tar xvzf gnuboard4.utf8.tgz

gnuboard4/
gnuboard4/_tail.php
gnuboard4/lib/
gnuboard4/lib/latest.lib.php
gnuboard4/lib/poll.lib.php
gnuboard4/lib/cheditor4.lib.php
gnuboard4/lib/etc.lib.php
gnuboard4/lib/popular.lib.php
gnuboard4/lib/visit.lib.php
gnuboard4/lib/connect.lib.php
gnuboard4/lib/common.lib.php
gnuboard4/lib/outlogin.lib.php
gnuboard4/lib/constant.php
gnuboard4/lib/mailer.lib.php
gnuboard4/lib/trackback.lib.php
gnuboard4/head.sub.php
gnuboard4/style.css
gnuboard4/cheditor5/
gnuboard4/cheditor5/css/
gnuboard4/cheditor5/css/imageUtil.css
gnuboard4/cheditor5/css/dialog.css
gnuboard4/cheditor5/css/CHXImage.css
gnuboard4/cheditor5/css/default.css
gnuboard4/cheditor5/css/p.css
gnuboard4/cheditor5/css/imageUpload.css
gnuboard4/cheditor5/imageUpload/
gnuboard4/cheditor5/imageUpload/delete.php
gnuboard4/cheditor5/imageUpload/_config.php
gnuboard4/cheditor5/imageUpload/upload.php
gnuboard4/cheditor5/imageUpload/_common.php
gnuboard4/cheditor5/cheditor.js
tar: ?ㅼ쓬 ?ㅻ뜑濡?嫄대꼫 ?€

gzip: stdin: invalid compressed data--format violated
tar: Child returned status 1
tar: Error exit delayed from previous errors


이렇게 풀리다가 에러가 나버리네요.....

tar 옵션이 틀린것 같은데.....아시는분 답변을 부탁드립니다.....