ACER laptop not connecting via wifi

hi, i have an ACER Aspire 4741Z and i am not able to connect via wifi
I can connect fine with ethernet but wifi is not working...the tray icon always shows a red cross

Wifi used to work fine about 2 months ago but now its not working ...please help me :)

heres the results from ipconfig/all (something like that which i found on other forums )

Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.

C:\Users\TANMOY ROY>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : TANMOYROY-PC
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

PPP adapter TATA PHOTON+:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : TATA PHOTON+
Physical Address. . . . . . . . . :
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv4 Address. . . . . . . . . . . : 14.99.188.22(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.255
Default Gateway . . . . . . . . . : 0.0.0.0
DNS Servers . . . . . . . . . . . : 121.242.190.181
121.242.190.210
NetBIOS over Tcpip. . . . . . . . : Disabled

Wireless LAN adapter Wireless Network Connection:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Broadcom 802.11n Network Adapter
Physical Address. . . . . . . . . : 90-4C-E5-5D-E1-F9
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Ethernet adapter Local Area Connection:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Broadcom NetLink (TM) Gigabit Ethernet
Physical Address. . . . . . . . . : 00-26-2D-AF-84-78
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter isatap.{BE842C4B-3BC0-4EFC-AF20-2891B570F90D}:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #2
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 11:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2001:0:9d38:953c:1c88:33a3:f19c:43e9(Pref
erred)
Link-local IPv6 Address . . . . . : fe80::1c88:33a3:f19c:43e9%29(Preferred)
Default Gateway . . . . . . . . . :
NetBIOS over Tcpip. . . . . . . . : Disabled

Tunnel adapter isatap.{06EADD92-FB92-472F-9406-D93019C8A538}:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #3
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter isatap.{78463C52-821F-41D8-92E4-E92AFCD70A05}:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #7
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter 6TO4 Adapter:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft 6to4 Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2002:e63:bc16::e63:bc16(Preferred)
Default Gateway . . . . . . . . . : 2002:c058:6301::c058:6301
DNS Servers . . . . . . . . . . . : 121.242.190.181
121.242.190.210
NetBIOS over Tcpip. . . . . . . . : Disabled

C:\Users\TANMOY ROY>

thanks for the speedy reply here is the output of the device manager :

when i press fn + f3 i get a small window to enable/disable wifi/bluetooth. i have set wifi at "on" and bluetooth at "off".

when i go in the control panel, there is no 'manage wireless networks' option...(i saw this in other forums)



so i typed 'wireless' in the start menu n got a link...it says 'wireless is not currently enabled'

hardisk icon : flashing blue
wifi icon : orange when i press fn + f3 n set it to 'on'. when i set it to 'off' , there is no light. But when i set it to on i still cant detect my home's wifi