Problem unsolve! :-(

Here I'm trying to explain my problem with better details... I have a web server that I'm using to share file with my clients. So my client are not using a ftp client software. Client have their own web_user directory on my server example: ip. 202.202.020.1/adq is muy client adq... Clients are login from their own browser, ie most of the time... With my old server people was able to upload file from the ie windows with a simple upload field. I think it's a question of upload permission but, When I'm trying to set my upload permission that bring me an error...like: server response: SITE_umask not supported So im in trouble! :-) If you can help me thanks, I was looking for an alternative in php but, dont know if it's usefull like the other way... Because user must upload in any folder of his own directory... Thanks Ben