Adding CSS - Almost working. Please help!!

I am not a programmer, do not own HTML Editor or iRite and thought purchasing this solution would be a great add-on. I have little hair as it is but I am losing more as I try to figure out how to add CSS styles to pages. Some people have it figured out and that makes me wonder if I am not as smart as I thought. Here's my dilemma:

I have updated the "cms_styles" CSS, "insert" and "update" files as suggested. I was thrilled to see the styles show up in the drop down menu and even happier when I was able to apply them to the text. I almost started to cry when I hit Update and all the styles were gone, except for "Red Title" that's set up in the fckconfig file. Why do all the styles disappear in the preview when I save the changes? They don't show up in the PHP file that includes the Developer Notes either. I thought it may have something to do with the "update" page but I have not idea... :-(

I hope I am not the only person who is banging his head against the screen trying to figure this out. Please help!!!!

Thank you in advance :-)