Cannot connect to iTunes store account.

Question

Somehow I can access the regular iTunes store and browse the music & apps there, but as soon as I try to access my account, either by clicking on "Account" on the right hand side or on my apple ID on the upper right, iTunes tries to connect but times out after ~20 seconds.
Everything else works, iTunes is listed in the firewall exceptionsand I have just installed the latest version.
Any hints on what else I could check or do?
======================
Diagnostics are listed below:
Microsoft Windows XP Professional Service Pack 3 (Build 2600)
Hewlett-Packard HP Compaq 6510b (GR690ET#ABD)
iTunes 8.2.0.23
QuickTime 7.6.2
FairPlay 1.4.10
iPod Updater Library 8.1d19
CD Driver 2.1.0.1
CD Driver DLL 2.1.1.1
Apple Mobile Device 2.5.1.3
Apple Mobile Device Driver 1.29.0.0
Bonjour 1.0.6.2 (118.5)
iTunes Serial Number 6EE10E050C09B1BC
Current user is an administrator.
The current local date and time is 2009-06-16 15:13:07.
iTunes is not running in safe mode.
Video Display Information
Mobile Intel(R) 965 Express Chipset Family
Mobile Intel(R) 965 Express Chipset Family
** External Plug-ins Information **
Plug-in Name: Samurize Plugin 1.64
Plug-in Loaded: Yes
Plug-in Version: 0.8
Plug-in File Version: Unknown
Plug-in Path: C:\Programme\iTunes\Plug-ins\iTunesSamurizeInfo.dll
** Network Connectivity Tests **
Network Adapter Information
Adapter Name: {A57CFFB2-802F-4381-963D-06096C1C7D55}
Description: Broadcom NetLink (TM) Gigabit Ethernet - Paketplaner-Miniport
IP Address: 192.168.10.21
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.10.2
DHCP Enabled: No
DHCP Server: 255.255.255.255
Lease Obtained: Thu Jan 01 01:00:00 1970
Lease Expires: Thu Jan 01 01:00:00 1970
DNS Servers: 192.168.10.3
192.168.10.3
Adapter Name: {59291605-B58C-4FE1-8639-9946CEB9EFF9}
Description: Intel(R) PRO/Wireless 3945ABG Network Connection - Paketplaner-Miniport
IP Address: 0.0.0.0
Subnet Mask: 0.0.0.0
Default Gateway:
DHCP Enabled: Yes
DHCP Server: 255.255.255.255
Lease Obtained: Thu Apr 23 10:26:42 2009
Lease Expires: Thu Apr 23 11:26:42 2009
DNS Servers:
Active Connection: LAN-Verbindung
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 iTunes Store was successful.
Secure connection attempt to iTunes Store was successful.
Secure connection attempt to iPhone activation server was successful.
Last successful store access was 2009-06-16 14:38:44.

Answer 1

Somehow it worked again today. Maybe just some temporary glitch during the last two days.
However, it was strange that the connection to all iTunes store servers worked (according to the diagnostics and to me browsing the store) but not the account management...
Anyway, glad that it does now!