Correcting site errors since server transfer

Since moving our site to a dedicated server we are getting numerous 'error on page' messages on our site www.puremusic24.com. Please check out the site to see errors and ensure you feel you can fix them before bidding. A particular error which may be related to old version of mysql (v4.0) on the new server is essential to be fixed. If you register on the site and login then hover on the BATTLE and go to 'unsigned video competition' and then the 'add entry'. If you now fill out all the essential details and click send you get an error message saying 'missing category'. We are urgently looking for someone skilled with joomla and joomla components - if you are skilled in this area and can sort these problems out swiftly and efficiently we have several further projects waiting attention Looking forward to you bids