Upgraded now iphone not recognised by itunes

Question

Iphone now not recognised by itunes upgrade failure, phone backup done? phone wiped clean, now not recognised by itunes. Iphone4 only shows symbol - connect to itunes. if rung goes straight to answer phone... can’t reinstall phone setting
Please Help!!!!
Microsoft Windows XP Home Edition Service Pack 3 (Build 2600)
Shuttle Inc SK22V10
iTunes 10.5.0.142
QuickTime not available
FairPlay 1.13.35
Apple Application Support 2.1.5
iPod Updater Library 10.0d2
CD Driver 2.2.0.1
CD Driver DLL 2.1.1.1
Apple Mobile Device 4.0.0.96
Apple Mobile Device Driver 1.57.0.0
Bonjour 3.0.0.10 (333.10)
Gracenote SDK 1.9.3.494
Gracenote MusicID 1.9.3.106
Gracenote Submit 1.9.3.136
Gracenote DSP 1.9.3.44
iTunes Serial Number 0012AA2407E53CC0
Current user is an administrator.
The current local date and time is 2011-10-25 10:59:39.
iTunes is not running in safe mode.
WebKit accelerated compositing is enabled.
HDCP is not supported.
Core Media is supported.
Video Display Information
NVIDIA GeForce 7900 GT/GTO
**** External Plug-ins Information ****
No external plug-ins installed.
**** Network Connectivity Tests ****
Network Adapter Information
Adapter Name:          {03B67EC8-2820-41F2-AEF0-217534063E15}
Description:          VIA Compatable Fast Ethernet Adapter - Packet Scheduler Miniport
IP Address:          192.168.1.8
Subnet Mask:          255.255.255.0
Default Gateway:          192.168.1.1
DHCP Enabled:          Yes
DHCP Server:          192.168.1.1
Lease Obtained:          Tue Oct 25 10:33:36 2011
Lease Expires:          Wed Oct 26 10:33:36 2011
DNS Servers:          192.168.1.1
Active Connection:          LAN Connection
Connected:          Yes
Online:                    Yes
Using Modem:          No
Using LAN:          Yes
Using Proxy:          No
SSL 3.0 Support:          Enabled
TLS 1.0 Support:          Enabled
Firewall Information
Windows Firewall is on.
iTunes is enabled in Windows Firewall.
Connection attempt to Apple web site was successful.
Connection attempt to browsing iTunes Store was successful.
Connection attempt to purchasing from iTunes Store was successful.
Connection attempt to iPhone activation server was successful.
Connection attempt to firmware update server was successful.
Connection attempt to Gracenote server was successful.
Last successful iTunes Store access was 2011-10-25 10:42:07.
**** CD/DVD Drive Tests ****
LowerFilters: Pfc (2.5.0.204), PxHelp20 (2.0.0.0),
UpperFilters: GEARAspiWDM (2.2.0.1),
E: PIONEER DVD-RW  DVR-111D, Rev 1.23
Audio CD in drive.
Found 8 songs on CD, playing time 74:00 on Audio CD.
Track 1, start time 00:02:00
Track 2, start time 04:07:56
Track 3, start time 18:33:06
Track 4, start time 23:01:36
Track 5, start time 37:41:28
Track 6, start time 45:20:46
Track 7, start time 50:53:11
Track 8, start time 61:04:51
Audio CD reading succeeded.
Get drive speed succeeded.
The drive CDR speeds are:   4 10 16 20 24 32 40 48.
The drive CDRW speeds are:   4.
The drive DVDR speeds are:   4.
The drive DVDRW speeds are:   4.
**** Device Connectivity Tests ****
iPodService 10.5.0.142 is currently running.
iTunesHelper 10.5.0.142 is currently running.
Apple Mobile Device service 3.3.0.0 is currently running.
Universal Serial Bus Controllers:
VIA Rev 5 or later USB Universal Host Controller.  Device is working properly.
VIA USB Enhanced Host Controller.  Device is working properly.
FireWire (IEEE 1394) Host Controllers:
VIA OHCI Compliant IEEE 1394 Host Controller.  Device is working properly.
Most Recent Devices Not Currently Connected:
iPod classic running firmware version 1.1.2
Serial Number:          8K741QXJYMV
iPhone 4 (GSM) running firmware version 4.2.1
Serial Number:          83052PL1A4S
**** Device Sync Tests ****
No iPod, iPhone, or iPad found.

Answer 1

Read here to troubleshoot your issue - http://support.apple.com/kb/TS1591