Question: you do not have permission to access samba share?
Answer: check your smb. conf file with testparm (just in case)
restart smbd deamon.
wait for a minute.
attempt a connection to the Media share with you Windows 7 computer.
check Samba smbd deamon log in /var/log/samba (if I remember well, otherwise check log files' location with smbd -b | grep LOGFILEBASE)