Can you tell that it is bubbling away as if there is wild yeast present? If not, then it won't raise your bread without the addition of some commercial yeast.
Have you fed it at all in those 10 days or just let it sit there? I would try discarding all but one cup of the starter, then feed it with 1/2 cup water (not tap water, but bottled/spring water) and 1/2 cup flour. Then watch it over the next 24 hours and see if there is any action in it - bubbles forming, rising then falling action - does it look alive. If you do not see any action, I would pitch it and start again with a different starter recipe. One cup of sugar to 1 cup of flour seems like too much sugar to me.
Just my opinion.