If you don't like an included script in a included pre-made server build (I assume you are running some vbox premade image) then you are free to open the script and modify which things it restarts and how. Take some time and open the script to see what it runs and what you would want to change about it
You also need to make sure the included PwAdmin is actually intended to work with 1.5.5, but other than that just go to the directory which has the PwAdmin files in it and check the configuration files to make sure it matches your database information.
you need to go into pwadmin and enter your servers information + MySQL information for it to work right, it doesn't just come setup already.
pwadmin.conf or some configuration file in the pwadmin directory mate..
the first step would be finding the configuration file and then asking about the contents of it so we can tell you what the sections mean