## need help with ANT!!!!!

Hi,
I am using Ant thru eclipse IDE,
wheni runthe build script it gives me the following error

BUILD FAILED:
com.sun.tools.javac.Main is not on the classpath.
Perhaps JAVA_HOME does not point to the JDK
Total time: 1 second

the problem is i have the JRE, and i have set the path as follows

Java_Home = C:\Program Files\java\j2re1.4.2_01\bin
classpath = C:\Program Files\java\j2re1.4.2_01\bin;
Path = C:\Program Files\Java\j2re1.4.2_01\bin;

and i run ant fromthe command prompt it even gives me this error saying "tools.jar not found!"

i have a JRE, do ineed to get the JDK , if so which one and cani install it in the same folder c:\programfiles\java
where the JRE is ;located? or should i store it somehweere different!