Leggi la FAQ 2.8

per tua comodita' la quoto:

2.8 I get "Missing parameters" errors, what can I do?

Here are a few points to check:

* In config.inc.php, try to leave the $cfg['PmaAbsoluteUri'] directive empty. See also FAQ 4.7.
* Maybe you have a broken PHP installation or you need to upgrade your Zend Optimizer. See http://bugs.php.net/bug.php?id=31134.
* If you are using Hardened PHP with the ini directive varfilter.max_request_variables set to the default (200) or another low value, you could get this error if your table has a high number of columns. Adjust this setting accordingly. (Thanks to Klaus Dorninger for the hint).
* In the php.ini directive arg_separator.input, a value of ";" will cause this error. Replace it with "&;".
* If you are using Hardened-PHP, you might want to increase request limits.
* The directory specified in the php.ini directive session.save_path does not exist or is read-only.
Se proprio non ne esci vai nella cartella \data di mysql e crea una sottocartella con il nome del database voluto. poi apri phpmyadmin e troverai il nuovo db.