I installed Apache Tomcat 6.0 to a C:/Program Files folder and I set the environmental variables JAVA_HOME and CATALINA_HOME, but when
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.