Noclassdeffounderror With Parse

Can somebody help me to fix this? When I run my android application on eclipse using a parse class created by Parse this issue appear. 03-27 11:43:35.378: E/AndroidRuntime(25869):

Solution 1:

java.lang.NoClassDefFoundError comes into picture if the classloader, which is responsible for dynamically loading classes, cannot find the .class file for the class that you're trying to use. It probably indicates that you haven't set the classpath option when executing your code.

This link explains how to set the classpath when you execute.