CPanel/Mysql database recognition hassles

Hi all, relative newbie here. I acquired the new joobsbox and whilst uploading and installing, one comes to the page (Zend framework) To enter the following:

InstallationWelcome to Joobsbox installation!
I need some information and then we're ready to go.


Site information
Site name
Database information
Database name*
Database username*
Database password*
Database host*
Table prefix

I have created mysql databases and users but this page will not accept anything I put in. If my site is jackrobbins.com on Cpanel the database name say, test, defaults to jackrobbins_test, am I right? So should I enter as the above:

Database name: jackrobbins_test or just test
Database username: jackrobbins_admin or just admin
Password I presume is exactly as entered
Host, says usually localhost. Does this stay the same on Cpanel?
Table Prefix? What is this?

They also ask for a site name, now will this be the site as registered with Cpanel? Or the site name I want?

Any help here greatly appreciated.

 

Just tried it still no go... I really don't undestand this. Could there be a problem with cpanel? I'm having hassles with a different site on the same hosting...

 

I know, just didn't want to put my passetc on here.

mobisex_hrmobile
mobisex_admin
site mobisextrader.com

no single set of variables will work

I am just playing around with a new hr site on an old domain with cpanel 3

 

Still no joy

Does anyone know of a mysql only type site etc where I can host my db seperately outside of cpanel? I am really stuck here and every site I have hosted with this company has the same error...