Getting SVN on http


so i did the tutorial to get the svn working with ssh but what i need is to be able to do commits and updates through the http. such as:” normaly putting this into tortus will show me my current project and allow me to do updates but when i try to do any commits or even add a folder i get a 501 not implemented error. it happens with rapid svn too so i know its not a problem on the client end. i have a feeling it has something to do with enabling webDAV but im a bit stuck at this point. help!