SEO plugin and keywords

Hey Everybody,

I am having trouble with my new theme rtmoto i love the theme and have really hacked it to make it my own but i a have run into a problem with the seo or plugin.

I was using the elegant grundge theme that was good but very dark I noticedI was not get ranked anywhere in google even with the all in one seo plugin. so i looked at the code and noticed the key word were not showing so I added it them to my header and was ranked on the first page under farnham roofing. now I have changed the theme to rtmoto and pasted the key words into the header I am again ranked know-where on google. My web site is http://www.uponaroof.co.uk

Is my plug in affecting what i put in the header for this theme, please could somebody help its frustrating me?

Thanks guys for your time

Joel