ProFTP and symlinks… not working

Hi all! I have this stupid problem. I have a few users set in my ProFTP configuration. My own user's homedir contains some aliases. I created them via the Terminal using the ln -s command. They work perfectly when I call them using the terminal but when I log in my ProFTP server and try to navigate them I get this error "No such file or directory". WHY???? If I create an alias via the Finder, ProFTP sees it as a document (not the original, that was a folder, but something like a txt document or similar). Someone can help me? thanx a lot Lukas