j2ee tutorial problem with build.xml

When I am trying to compile the first exapmle "converter" I get following response: Property doesnt support the "environment" attribute.Does anyone have a clue what s the problem?
[200 byte] By [jannesivula] at [2007-9-26 1:48:12]
# 1
Maybe you are using an old version of Ant. Download Ant version 1.3 here: http://jakarta.apache.org/builds/jakarta-ant/release/v1.3/bin/regardsJesper
jesper1 at 2007-6-29 2:48:12 > top of Java-index,Archived Forums,New To Java Technology Archive...