Site transfer-Problem with bridging

Hi
I have recently moved our site from one hosting provider to another.I have transfered all files as they are from one ftp to another and i imported the whole database to the new hosting account with an sql command.The problem is that after i patch joomla files the encoding goes totally wrong and everything is uncomprehensible.In both sites i have used greek utf8 characters,actually i didn't change anything in the database encoding.I have tried every method from unpatching the files before moving them to manually adding the code to index.php but yet nothing.I add the weblinks to both the old and new site.

www.in-xios.gr (the old one that works properly)
http://inxios.sc11.co.uk (the new server look the encoding i have patched joomla files)

Seriously i am looking for an answer because i have seeked help from hosting company but they couldn't help me.Thanks in advance