could not find class javax.activation.DataHandler from file activation.jar ???

[Chen, Donald]

Hi, there.   I tried to run the http://127.0.0.1:8080/axis/happyaxis.jsp, and got this message:     Error: could not find class javax.activation.DataHandler from file activation.jar     Axis will not work.     See http://java.sun.com/products/javabeans/glasgow/jaf.html   I use Axis 12. with Tomcat 5.5 on windows XP professional, the JRE is J2SE 1.5.   Did I miss something?   Thanks,   Don