I can take a look if you send ftp info but I can tell ya it was set when we installed it.
Your install was a while ago so basically your server permissions where dropped it would seem.
That does happen every now and then and here is a good tutorial on how to set permissions
http://www.computerhope.com/unix/uchmod.htm
Basically by right click the directory in ftp you can usually bring up chmod or properties where you can set things to 777