Problem with repotools and custom plugin

Hi guy,
I have created a little plugin for insert into DW also the custom workitem values.

The first time, the plugin perfectly work (creates tables and populates) but the values is wrong: my bad :)

Now I fix the error, and I make this step:
-drop the Jazz database (db2 drop database JAZZ),
-delete my plugin and feature jar,
-delete a entry into \server\update-site\site.xml,
-delete my .ini file in \server\provision_profiles folder
-run the command

repotools -createTables

and surprise, I have yet my old version table....why?????? :?:

Any suggestions?
Thanks
Andrea