opening ports 10000/65535 for FTP stops my sites from showing

hello all,

i have virtualmin/webmin installed on my ubuntu server and im trying to enable FTP if i open ports 10000/65535 it stops all my sites from showing up but FTP works and ofcause is i dont open thoughs ports the sites work but FTP doesnt!

does anyone know what i should do?

thank you for your time!

you should only have to open port 21 for ftp