Itunes 10.6 doesn't recognize my iphone 4s 32gb, could you please help me?

Question

I bought an iPhone 4s 32gb from Singapore. I'm living in Chennai, India. To connect it to my computer (windows XP,), I have downloaded iTunes 10.6.1.7. Unfortunately iTunes is not recognizing my iPhone.  I had tried to troubleshoot it by reinstalling iTunes (2 times). I have restarted the apple mobile device from control panel. I try connecting my iphone in another usb port. but no use. I don't know what am I missing?.  iTunes opens on my computer. but doesn't recognize my device. when I click on help. it says an "unknown error has occurred. your computer is not connected to internet. please check your internet connection and try again later". I don't know what to do? could you please help me? thank you so much for your help and time.
I did the apple's diagnostics test on my computer. I'm pasting the result for your info.
Microsoft Windows XP Professional Service Pack 3 (Build 2600)
System manufacturer System Product Name
iTunes 10.6.1.7
QuickTime not available
FairPlay 1.14.37
Apple Application Support 2.1.7
iPod Updater Library 10.0d2
CD Driver 2.2.0.1
CD Driver DLL 2.1.1.1
Apple Mobile Device 5.1.1.4
Apple Mobile Device Driver not found.
Bonjour 3.0.0.10 (333.10)
Gracenote SDK 1.9.5.502
Gracenote MusicID 1.9.5.115
Gracenote Submit 1.9.5.143
Gracenote DSP 1.9.5.45
iTunes Serial Number 0013AC2C0E8DEF50
Current user is an administrator.
The current local date and time is 2012-06-12 20:13:12.
iTunes is not running in safe mode.
WebKit accelerated compositing is enabled.
HDCP is not supported.
Core Media is supported.
Video Display Information
Intel(R) G41 Express Chipset
**** External Plug-ins Information ****
No external plug-ins installed.
**** Network Connectivity Tests ****
Network Adapter Information
Adapter Name:        {D85300A1-330D-41ED-AC5A-EC032B22FBF0}
Description:            Atheros AR8121/AR8113/AR8114 PCI-E Ethernet Controller - Packet Scheduler Miniport
IP Address:             192.168.1.3
Subnet Mask:          255.255.255.0
Default Gateway:    192.168.1.1
DHCP Enabled:      Yes
DHCP Server:         192.168.1.1
Lease Obtained:     Tue Jun 12 19:48:36 2012
Lease Expires:       Wed Jun 13 07:48:36 2012
DNS Servers:         192.168.1.1
Active Connection: LAN Connection
Connected:             Yes
Online:                    Yes
Using Modem:        No
Using LAN:             Yes
Using Proxy:           No
Firewall Information
Windows Firewall is on.
iTunes is enabled in Windows Firewall.
Connection attempt to Apple web site was unsuccessful.
The network connection timed out.
Basic connection to the store failed.
The network connection timed out.
Connection attempt to Gracenote server was successful.
The network connection timed out.
iTunes has never successfully accessed the iTunes Store.
**** CD/DVD Drive Tests ****
No drivers in LowerFilters.
UpperFilters: GEARAspiWDM (2.2.0.1),
G: Optiarc DVD RW AD-7220A, Rev 1.01
Drive is empty.
**** Device Connectivity Tests ****
iPodService 10.6.1.7 is currently running.
iTunesHelper 10.6.1.7 is currently running.
Apple Mobile Device service 3.3.0.0 is currently running.
Universal Serial Bus Controllers:
Intel(R) N10/ICH7 Family USB Universal Host Controller - 27C8.  Device is working properly.
Intel(R) N10/ICH7 Family USB Universal Host Controller - 27C9.  Device is working properly.
Intel(R) N10/ICH7 Family USB Universal Host Controller - 27CA.  Device is working properly.
Intel(R) N10/ICH7 Family USB Universal Host Controller - 27CB.  Device is working properly.
Intel(R) N10/ICH7 Family USB2 Enhanced Host Controller - 27CC.  Device is working properly.
No FireWire (IEEE 1394) Host Controller found.
**** Device Sync Tests ****
No iPod, iPhone, or iPad found.

Answer 1

Well, you do not mention what computer OS you are using, so here are the support documents for both.
Windows:     http://support.apple.com/kb/TS1538
OS X:     http://support.apple.com/kb/TS1591