I think the problem is in the Standards-Version field. Value should be 3.7.2
It is the version of the packaging system, not of your application (application version is retrieved from changelog file).

As a further note, Section should be user/education.
Packages not under user section are not considered as end-user applications, so they will not be shown as installable applications to users by the Maemo application manager.

You find everything you need to know in this section within maemo.org wiki:
http://wiki.maemo.org/Maemo_packagin...ng_information