Find out if the jar files required for JCE unlimited strength are present and in use on your machine or not.

JCETest.java

import javax.crypto.Cipher;
public class JCETest {
  public static void main(String[] args) throws Exception {
		boolean limit = Cipher.getMaxAllowedKeyLength("RC5")<256;
		System.out.println(limit);
	}
}