SSH and SFTP Timeout

hey all,

the following config in sshd_config has been stalling on me.

Subsystem sftp internal-sftp

Match group www
    ChrootDirectory %h
    X11Forwarding no
    AllowTcpForwarding no
    ForceCommand internal-sftp

and one mount in /etc/fstab

/srv/www/domain.com /home/user/domain.com none bind

when logged in via sftp if a user tries to download anything larger than a single file the connection times out, and no user can connect (sftp or ssh, root user included).

i'm not even sure where to start debugging this, so any help would be appreciated.