JDBC Ant Problem

I really need anybody's help on this problem. I am using Win2000 and PostgreSQL 7.1.1. I am now in the stage of 'make' command. When I typed in 'make', it always gave me the following error at the end.

{\rtf1\ansi\ansicpg1252\deff0\deflang1033{\fonttbl{\f0\fswiss\fcharset0 Arial;}}
\viewkind4\uc1\pard\f0\fs20 make[3]: Nothing to be done for `all'.\par
make[3]: Leaving directory `/home/Administrator/postgresql-7.1.1/src/interfaces/\par
libpgeasy'\par
make[3]: Entering directory `/home/Administrator/postgresql-7.1.1/src/interfaces\par
/jdbc'\par
/usr/bin/ant -buildfile ../../../build.xml -Dmajor=7 -Dminor=1 -Dfullversion=7.1\par
.1 -Ddef_pgport=5432\par
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/tools/ant/\par
Main\par
make[3]: *** [all] Error 1\par
make[3]: Leaving directory `/home/Administrator/postgresql-7.1.1/src/interfaces/\par
jdbc'\par
make[2]: *** [all] Error 2\par
make[2]: Leaving directory `/home/Administrator/postgresql-7.1.1/src/interfaces'\par
\par
make[1]: *** [all] Error 2\par
make[1]: Leaving directory `/home/Administrator/postgresql-7.1.1/src'\par
make: *** [all] Error 2\par
}

Is that the error from Ant class? Can someone give me an idea how to solve the problem?

Thanks.
Tum

Tuangporn Khawcharoenporn
Summa Technologies, Inc.
(412) 258-3342