Htaccess redirect

i am having some issues with users going to my domain without using the www - which disables some of the ajax features on my forum - i need to have it where if someone visits my domain without the www it will redirect them with the www

You need to go to the control panel to Manage Domains. Edit your Fully Hosted domain to use WWW only, rather than both (with and without). It’ll convert to automatically when a user visits.