Moving your blog within your server is easy, it just need to accomplish a few tasks and your website is good to go. However, moving your WordPress blog from one server to another is a daunting task and it needs special attention to details. In this guide, you need to know a few information and take note of the pointers on how you can move your WordPress site from one server to another. The trick in a successful migration is to backup everything before migrating. You don’t want to lose all your hard-earned posts and everything in it and start over again, do you?
Read how its done here: http://www.wordpressluv.com/moving-a-wordpress-blog-to-arvixe-hosting-account/