You did not moved your ejs source ahmed from ejsworkspace directory
to under [b]users[/b] subdirectory.  That is the reason why your uploaded jar file did not work.
Please check out [url=http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=1508.msg5729#msg5729]Re: Blackbody Radiation[/url]
for more detail information.