CATALINA_HOME environmental variable is not defined correctly

At first you have to mention tomcat up to tomcat’s version refer below

CATALINA_HOME: C:\Program Files\apache-tomcat-6.0.35;
then set CLASSPATH variable to

CLASSPATH : C:\Program Files\apache-tomcat-6.0.35\lib;

then finally edit path variable to
PATH: .;%CATALINA_HOME%\bin;

NOTE: a semicolon(;) must be put at the end of each and every variable.