I'm not sure that's giving you the correct result. You said you need to have 6 characters on the first part and 3 on the second one. You need to use 2 RIGHT functions to accomplish that.
Luis C.
General Disclaimer:
Are you seriously taking the advice and code from someone from the internet without testing it? Do you at least understand it? Or can it easily kill your server?
How to post data/code on a forum to get the best help: Option 1 / Option 2