Java EE (Java Enterprise Edition) General Discussion

I am using Tomcat 3.2.4 and all packages I need I put them into the /lib, it worked just fine with Oracle, iText, JavaMail and others.

I downloaded the cos.jar package form www.servlets.com and put it into the same directory. But when I try to use i get an error.

CODE
MultipartParser mp = new MultipartParser(request, request.getContentLength());

ERROR
Internal Servlet Error:

java.lang.NoClassDefFoundError: javax/servlet/ServletInputStream

I spent all day yesterday searching for an answer on this and no success.

Regards,
Rafael Dittberner