we have a samba server which we use for file sharing on windows 7 pc but its not working with different authentications on different folders whenever we enter the server through networking "\\ipaddress" it immediately asking for a username and password ?

Here is the smb.conf
[global]

# ----------------------- Network Related Options -------------------------
#
# workgroup = NT-Domain-Name or Workgroup-Name, eg: MIDEARTH
#
# server string is the equivalent of the NT Description field
#
# netbios name can be used to specify a server name not tied to the hostname
#
# Interfaces lets you configure Samba to use multiple interfaces
# If you have multiple network interfaces then you can list the ones
# you want to listen on (never omit localhost)
#
# Hosts Allow/Hosts Deny lets you restrict who can connect, and you can
# specifiy it as a per share option as well
#
workgroup = MYGROUP
server string = Samba Server Version %v

; netbios name = MYSERVER

; interfaces = lo eth0 192.168.12.2/24 192.168.13.2/24
; hosts allow = 127. 192.168.12. 192.168.13.


# ----------------------- Standalone Server Options ----------------
#
# Scurity can be set to user, share(deprecated) or server(deprecated)
#
# Backend to store user information in. New installations should
# use either tdbsam or ldapsam. smbpasswd is available for backwards
# compatibility. tdbsam requires no further configuration.

security = user
passdb backend = tdbsam

#----------------------------- Name Resolution -------------------------------
# Windows Internet Name Serving Support Section:
# Note: Samba can be either a WINS Server, or a WINS Client, but NOT both
#
# - WINS Support: Tells the NMBD component of Samba to enable it's WINS Server
#
# - WINS Server: Tells the NMBD components of Samba to be a WINS Client
#
# - WINS Proxy: Tells Samba to answer name resolution queries on
# behalf of a non WINS capable client, for this to work there must be
# at least one WINS Server on the network. The default is NO.
#
# DNS Proxy - tells Samba whether or not to try to resolve NetBIOS names
# via DNS nslookups.

; wins support = yes
; wins server = w.x.y.z
; wins proxy = yes

; dns proxy = yes
#============================ Share Definitions==============================

[homes]
comment = Home Directories
browseable = no
writable = yes
; valid users = %S
; valid users = MYDOMAIN\%S

[samba]
comment = Medryte
path = /samba
public = no
writable = yes
printable = no
browseable = yes
write list = adm


[printers]
comment = All Printers
path = /var/spool/samba
browseable = no
guest ok = no
writable = no
printable = yes

# Un-comment the following and create the netlogon directory for Domain Logons
; [netlogon]
; comment = Network Logon Service
; path = /var/lib/samba/netlogon
; guest ok = yes
; writable = no
; share modes = no


[Webdevelopemt]
comment = folder for credential confidentiality
path = /Webdevelopment
browseable = yes
writeable = yes
create mask = 0775
valid users = @webdevelopment
[SHARE]
comment = Medryte
path = /home/share
writeable = yes
; browseable = yes
create mask =0755
valid users = share



[HCC]
comment = Medryte
path = /home/HCC
writeable = yes
browseable = yes
create mask =0755
valid users =medrytehcc

Here i created a newshare called "webdevelopment" which was given different authentication, but its not logging in says access is denied and whenever I trid to go into the network via //192.168.1.2 its asking for authentication which I have used for another folder called "SHARE" ?