Class NotFound Error after deploying to Production Server

[Daniel Daud Buchafwe]

Hi All;

I am new in tapestry and trying to write my first application, I am 
utilizing httpclient in my application so that I can http request to 
other with xml content, all works okay in my localhost, but after 
deploying it to development server I am getting the below error:


 "An unexpected application exception has occurred.

java.lang.ClassNotFoundException: org.apache.http.entity.StringEntity"

Please advice.

Regards,
Daniel.