Java – Error installing Ant: ANT_HOME is set incorrectly

I read all the possible solutions but the none worked.
I downloaded the ant and put it in C:\ant (so I have C:\ant\bin)

On Windows 7 under System variables I have variable called ANT_HOME with value

C:\ant

and variable called PATH with value

%ANT_HOME%\bin

And when I try in cmd (Command Prompt)

ant -version

I get

ANT_HOME is set incorrectly or ant
could not be located. Please set
ANT_HOME.

Also, if I try

echo %ANT_HOME%

I get

C:\ant

I tried PATH = %PATH%;%ANT_HOME%\bin but the same situation. Anyone?

EDIT:

Variables are (name – value):

ANT_HOME - C:\ant
CLASSPATH - .;C:\Program Files\Java\jre6\lib\ext\QTJava.zip
ComSpec - %SystemRoot%\system32\cmd.exe
FP_NO_HOST_CHECK - NO
JAVA_HOME - C:\Program Files\Java\jdk1.6.0_23
NUMBER_OF_PROCESSORS - 2
OS - Windows_NT
PATH - %ANT_HOME%\bin;%JAVA_HOME%\bin
PATHEXT - .COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC
PROCESSOR_ARCHITECTURE - x86
PROCESSOR_IDENTIFIER - x86 Family 6 Model 15 Stepping 6, GenuineIntel
PROCESSOR_LEVEL - 6
PROCESSOR_REVISION - 0f06
PSModulePath - %SystemRoot%\system32\WindowsPowerShell\v1.0\Modules\
QTJAVA - C:\Program Files\Java\jre6\lib\ext\QTJava.zip
TEMP - %SystemRoot%\TEMP
TMP - %SystemRoot%\TEMP
USERNAME - SYSTEM
windir - %SystemRoot%
XNAGSShared - C:\Program Files\Common Files\Microsoft Shared\XNA\
XNAGSv4 - C:\Program Files\Microsoft XNA\XNA Game Studio\v4.0\