Perl, Apache, Unix Permissions, and FTP

I have a Perl script running under mod_perl that creates files and folders on a web server on the fly. If it creates a file like this...

open COUNTFILE, "+<" . "myfile.txt"

Then everything works great. My users are able to FTP up to the site and manually delete the file (through FTP). But if I make a directory like this...

mkdir($strPassDir, 0707);

then I'm not able to FTP up to the site and delete it manually. In addition I'm not able to delete through FTP, files that are created inside this directory. I get the FTP error message:

550 myfile.txt Permission denied.

It seems that it does not matter what permissions I give the directory (i.e. mkdir($strPassDir, 0707) I still cannot delete it through FTP.

What is going on? Any help would be appreciated.

Thanks.

check the unix group owner on the directories