Samba stopped working today

[dangeorge6]

Samba on my ubuntu linux boxed stopped working today and I don't know what the issue is. My remote computers can no longer access it at it's ip address. When connecting, my pc displays "an error occured while reconnecting to [my server name]...the network name could not be found". It worked perfectly a few hours ago, so i'm stumped. I've restarted smbd, restarted the computer...no luck. I also run ISPconfig which still works, so it looks like it's not an issue of finding the computer on the network. Thanks

Some things I did recently:
-Changed some permissions on folders as root
-while connected to the linux box via samba, my mac went to sleep

netstat -tap:

Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 localhost:2208 *:* LISTEN -
tcp 0 0 localhost:1225 *:* LISTEN -
tcp 0 0 localhost:mysql *:* LISTEN -
tcp 0 0 *:netbios-ssn *:* LISTEN -
tcp 0 0 *:81 *:* LISTEN -
tcp 0 0 virtual-ip1.exam:domain *:* LISTEN -
tcp 0 0 host1.leavitt.co:domain *:* LISTEN -
tcp 0 0 localhost:domain *:* LISTEN -
tcp 0 0 localhost:ipp *:* LISTEN -
tcp 0 0 localhost:953 *:* LISTEN -
tcp 0 0 *:smtp *:* LISTEN -
tcp 0 0 *:microsoft-ds *:* LISTEN -
tcp 0 0 host1.leavitt.com:1923 po-in-f91.google.co:www ESTABLISHED5529/firefox-bin
tcp6 0 0 *:imaps *:* LISTEN -
tcp6 0 0 *op3s *:* LISTEN -
tcp6 0 0 *op3 *:* LISTEN -
tcp6 0 0 *:imap2 *:* LISTEN -
tcp6 0 0 *:www *:* LISTEN -
tcp6 0 0 *:ftp *:* LISTEN -
tcp6 0 0 *:ssh *:* LISTEN -
tcp6 0 0 ip6-localhost:953 *:* LISTEN -
tcp6 0 0 *:https *:* LISTEN -

my /etc/samba/smb.conf:

[global]
; General server settings
netbios name = LEAVITT_SERVER

workgroup = MSHOME
announce version = 5.0
socket options = TCP_NODELAY IPTOS_LOWDELAY SO_KEEPALIVE SO_RCVBUF=8192 SO_SNDBUF=8192

passdb backend = tdbsam
security = user
null passwords = true
username map = /etc/samba/smbusers
name resolve order = hosts wins bcast

wins support = yes

printing = CUPS
printcap name = CUPS

syslog = 1
syslog only = yes

; NOTE: If you need access to the user home directories uncomment the
; lines below and adjust the settings to your hearts content.
;[homes]
;valid users = %S
;create mode = 0600
;directory mode = 0755
;browseable = no
;read only = no
;veto files = /*.{*}/.*/mail/bin/

; NOTE: Only needed if you run samba as a primary domain controller.
; Not needed as this config doesn't cover that matter.
;[netlogon]
;path = /var/lib/samba/netlogon
;admin users = Administrator
;valid users = %U
;read only = no

; NOTE: Again - only needed if you're running a primary domain controller.
;[Profiles]
;path = /var/lib/samba/profiles
;valid users = %U
;create mode = 0600
;directory mode = 0700
;writeable = yes
;browseable = no

; NOTE: Inside this place you may build a printer driver repository for
; Windows - I'll cover this topic in another HOWTO.
[print$]
path = /var/lib/samba/printers
browseable = yes
guest ok = yes
read only = yes
write list = root
create mask = 0664
directory mask = 0775

[printers]
path = /tmp
printable = yes
guest ok = yes
browseable = no

; Uncomment if you need to share your CD-/DVD-ROM Drive
;[DVD-ROM Drive]
;path = /media/cdrom
;browseable = yes
;read only = yes
;guest ok = yes

[MyFiles]
path = /

read only = no
guest ok = no
create mask = 0644
directory mask = 0755
force user = danny
force group = danny
available = no
browsable = yes
public = no
writable = no

[dangeorge6]

i fixed the problem by changing 'available' from no to yes under the [MYFILES] section. Any idea what happened here? I have absolutely no recollection of changing the 'available' parameter.