FTP For Subdomain

I am setting up subdomains for a few friends of mine and I can’t them working. If I log into the FTP with the main account I can see their folder and if I put files in it it shows up on their subdomain online, but when they login with their username and password there is nowhere for them to put their files. I looked around the admin panel but it’s kind of confusing and I can’t figured it out (boy, I feel stupid). I searched the forums and I think someone else had the same problem as me, but I couldn’t figure out the solution given. Thanks in advance.

Nevermind, I figured it out.