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)