Help with an executable jar file

Can somebody please help find oput what is wrong with my jar file... i think i got my manifest right but it still wotn oepn when i double click..you cna downlaod the jar here <a href="http://www.xtrememadden.com/houseRental.jar" > DOWNLOAD HERE </a>
[282 byte] By [jtobin22a] at [2007-11-27 7:09:25]
# 1
Is your main class "ManagementSide" inside a package?If so then in manifest.mf you have to specify the package name also.Achyuth
achyuthba at 2007-7-12 19:00:47 > top of Java-index,Java Essentials,New To Java...
# 2

here is the link for my jar file [URL]http://www.xtrememadden.com/houseRental.jar [/URL]

here is also a link to my java files

http://www.xtrememadden.com/project.zip [/URL]

i will really appreciate if somebody cna build me a jar using those files and posting it.....or giving me instructions in what was wrong with my jar, thank you.

jtobin22a at 2007-7-12 19:00:47 > top of Java-index,Java Essentials,New To Java...