Problems with margins and can't write on override.css

I am having problems with margins for the modules, right now I have only tested top1 and top2, I would like the same look as the template on your website but I cannot achieve it. I am always having a margin at the top even if the (space)clear suffix is entered.

I have found an earliest post with the similar problem I have, one of the moderator suggested to add the following line to the override.css

.moduletable.clear .moduletable_content table td{padding:0;}

The problem is when I go to the template parameter, I put enable override.css, it goes on but when I go to edit the file from joomla backend it says unwritable beside it, even if its on or off.

Can you guys help me out, this is really frustrating.

Thank you.

P.S: I have included a picture of the screen shot of my problem.

Do you have a lot of work done to your site? It looks like its been cleared right down. You should try reinstalling the template to save the trouble of troubleshooting and then just disable everything like you have now.

If that is not an option for you I will help you fix this

Well I wanted to start from sratch without installing the quickstart guide because I didn't want to go through removing every little thing on the template. Maybe I should. But any idea what would be the problem.

Thanks for replying