how to run pig scripts

[sumit piparsania]

Hi,
 
I am new to PIG and HADOOP. I configured PIG following the standard apche pig 
site.
However getting this error.
 
"Pig is not recognized command."
 
Have set the below paths
1) HADOOP_INSTALL
2) PIG_HOME
3)JAVA_HOME
 
Added all these Env variables to PATH. Pelase do let me know what is missing.
 
Thanks,
Sumit