enum Build of the css-validator from source cvs

I'm willing to compile css-validation on a linux system for local use.
I'm using this versions :jdk-1.5.0_06-fcs, jboss-3.2.5-6 (for
servlet-api.jar), xerces-j2-2.6.2-4

And i've already read information from this url's

http://esw.w3.org/topic/CssValidator
and
http://lists.w3.org/Archives/Public/www-validator-css/2004Jan/att-0000/build-css-validator-snapshot.txt

And based my configuration
bash script initilialising CLASSPATH & JAVA_HOME path is attached
:config-compil-ant

The source were downloaded from :http://dev.w3.org/cvsweb/2002/css-validator

I've also downloaded the following and placed the ".java" files in the
directory "2002/css-validator/org/w3c/www/"
http://dev.w3.org/cvsweb/java/classes/org/w3c/www/mime/
http://dev.w3.org/cvsweb/java/classes/org/w3c/www/http/

When i go to "2002/css-validator" and type :
ant build
there are 15 errors see attached file (ant-build.log)


17 warnings : "unmappable character for encoding UTF8"
15 errors :  "as of release 1.5, 'enum' is a keyword, and may not b
e used as an identifier"
(try -source 1.4 or lower to use 'enum' as an identifier)


Question : Do i have to use an older version of the jdk ?