4013 might be a cable or USB port problem, try different cable and port.
Also make sure you have latest iTunes installed
yea. i tried different cable and port this time it showed error 4014... then i run diagnostic through itunes ..
which gave following log :
Microsoft Windows Vista Home Premium Edition Service Pack 1 (Build 6001)
Dell Inc. Studio 1535
iTunes 11.1.0.126
QuickTime not available
FairPlay 2.5.16
Apple Application Support 2.3.6
iPod Updater Library 11.1f5
CD Driver 2.2.3.0
CD Driver DLL 2.1.3.1
Apple Mobile Device 7.0.0.117
Apple Mobile Device Driver 1.64.0.0
Bonjour 3.0.0.10 (333.10)
Gracenote SDK 1.9.6.502
Gracenote MusicID 1.9.6.115
Gracenote Submit 1.9.6.143
Gracenote DSP 1.9.6.45
iTunes Serial Number 0023BE080962F290
Current user is not an administrator.
The current local date and time is 2013-09-29 01:47:10.
iTunes is not running in safe mode.
WebKit accelerated compositing is enabled.
HDCP is not supported.
Core Media is supported.
Video Display Information
ATI Technologies Inc., ATI Mobility Radeon HD 3400 Series
**** External Plug-ins Information ****
No external plug-ins installed.
**** Network Connectivity Tests ****
Active Connection: LAN Connection
Connected: Yes
Online: Yes
Using Modem: No
Using LAN: Yes
Using Proxy: No
Firewall Information
Windows Firewall is off.
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 unsuccessful.
The network connection timed out.
Connection attempt to Gracenote server was successful.
Last successful iTunes Store access was 2013-09-29 01:44:24.
**** CD/DVD Drive Tests ****
No drivers in LowerFilters.
UpperFilters: GEARAspiWDM (2.2.3.0),
F: Optiarc DVD+-RW AD-7640S, Rev HD18
Drive is empty.
**** Device Connectivity Tests ****
iPodService 11.1.0.126 is currently running.
iTunesHelper 11.1.0.126 is currently running.
Apple Mobile Device service 3.3.0.0 is currently running.
Universal Serial Bus Controllers:
Intel(R) ICH8 Family USB Universal Host Controller - 2830. Device is working properly.
Intel(R) ICH8 Family USB Universal Host Controller - 2831. Device is working properly.
Intel(R) ICH8 Family USB Universal Host Controller - 2832. Device is working properly.
Intel(R) ICH8 Family USB Universal Host Controller - 2834. Device is working properly.
Intel(R) ICH8 Family USB Universal Host Controller - 2835. Device is working properly.
Intel(R) ICH8 Family USB2 Enhanced Host Controller - 2836. Device is working properly.
Intel(R) ICH8 Family USB2 Enhanced Host Controller - 283A. Device is working properly.
FireWire (IEEE 1394) Host Controllers:
RICOH OHCI Compliant IEEE 1394 Host Controller. Device is working properly.
Most Recent Devices Not Currently Connected:
iPod touch (4th generation) running firmware version 6.1.3
Serial Number: C3RDL1QMDCP9
iPhone 4S running firmware version 5.1.1
Serial Number: C28HM4EVDT9Y
**** Device Sync Tests ****
No iPod, iPhone, or iPad found.
does above bold means that my iphone4s
1. is having firmware 5.1.1
2. error 4013 was due to faialed to contact firmware update server
hope this wold help u in solving the problem.. suggest something ..


