Actually I thought I had it figured it out, but it's still not working and it brings up another issue. When I opened the skin in SS and clicked analyze, I got a bunch of errors related to Firefox. They all start out with "Warning The section Firefox.Browser is not supported (or has been removed from the specification) and should be deleted from the skin to improve the performance". I went into the code and removed all instances relating to Firefox then tried testing it again. However, I still get the "Can not write to" error. Note that this is a BRAND NEW skin, one that I have done no modifications to.
Also, whenever I try to open a skin I've been working on, it shows the folder, with the skin underneath. If I click on the folder, I get a message stating that there is no skin or the skin has been broken.
Any ideas?