Adding logos and such-access denied

When I try to upload my logo/heading for the site, it doesnt make it into the images file. I have tried naming it \"Logo.gif\" to replace the one that comes with the template, but that didnt work, either. I have also tried changing the css file to indicate my logo, but was unable to get those changes to save. I keep getting that access is denied. How do I make this site \"my\" site?


Also recently tried pointing the css reference to my logo in the general images file, since that was the only place that I was able to load it to, and still am unable to view it on my site.