I recently uploaded a website to a new 123-reg server on a single WP installation (www.moseleycoachsales.co.uk). I had developed the site on my own hosted multisite environment (http://test.digitalgroupmedia.com/moseley/).
I had a nightmare uploading the website as the standard wordpress xml export/import facility that had always worked for me kept crashing crashing. In the end I managed to get the website live using this method (http://matteth.wordpress.com/2012/01/12/exporting-a-site-from-multisite-to-single-installation/)
The live website is now very sluggish and nowhere near the speed it was on my test environment. I don't know if this is down to the new server, or if something has occurred in the website move (perhaps database related) that has created the issue?
I'm not great with MySQl so don't really have the skill to diagnose this issue (if it even is the issue) and would really appreciate some help.