General Support: Table already exists in installation re run installation loop

I have run the installation several time but at the beginning I have had a message error mentioning that was not possible to wtire over the php-config file.
I have change the persion on the file and run installation again
now I get a white screen tell me that the table already exists. fair enough
when I log in to the admin the system tellsme that i have to re-run the installation
when I do it i get the same message on the table already existing:

Table 'plogger_collections' already exists

CREATE TABLE `plogger_collections` ( `name` varchar(128) NOT NULL default '', `description` varchar(255) NOT NULL default '', `path` varchar(255) NOT NULL default '', `id` int(11) NOT NULL auto_increment, `thumbnail_id` int(11) NOT NULL, PRIMARY KEY (id) ) Type=MyISAM DEFAULT CHARACTER SET UTF8

when I log in

I get the same message

Please run _install.php to set up Plogger. If you are upgrading from a previous version, please run _upgrade.php.

that I clearly did

can you please help to get out from this loop?

thanks