Windows XP forum: 'View Workgroup Computers' not clickable..

Hi,
I ran out of ideas already and tips from google did not bring anything new to a problem that appeared to me some time ago.
I hope that you can help me on this issue. The point is that I cannot open 'View Workgroup Computers' in 'My Network Places' on my XP Pro SP3, hp nx6110.

At some point (I missed when) something happened and the result is:
- No clickable 'View workgroup computers' (left 'Network Tasks') in the 'My Network Places' explorer window.
- Total Commander is missing in 'Workgroup Computers' or anything like that pattern.
screenshot:
[URL=http://s1122.photobucket.com/albums/l540/a5hm3dai/?action=view¤t=2012-03-29_192611.jpg][IMG]http://i1122.photobucket.com/albums/l540/a5hm3dai/th_2012-03-29_192611.jpg[/IMG][/URL]

At home I have two laptops and one desktop, with them everything is ok because the shared folder on my hard disk is accessible from any of them. Only I can not access to folders on other devices.

Ok, what I checked:
'Services' necessary for the operation of the network are running:
- Computer Browser
- DHCP Client
- DNS Client
- Network Location Awareness
- Remote Procedure Call (RPC)
- Server
- TCP / IP NetBIOS Helper
- Workstation

Result of 'ipconfig / all':
[URL=http://s1122.photobucket.com/albums/l540/a5hm3dai/?action=view¤t=ipconfig.jpg][IMG]http://i1122.photobucket.com/albums/l540/a5hm3dai/th_ipconfig.jpg[/IMG][/URL]

Result of 'nbtstat':
[URL=http://s1122.photobucket.com/albums/l540/a5hm3dai/?action=view¤t=nbtstat.jpg][IMG]http://i1122.photobucket.com/albums/l540/a5hm3dai/th_nbtstat.jpg[/IMG][/URL]

Sharing enabled:
[URL=http://s1122.photobucket.com/albums/l540/a5hm3dai/?action=view¤t=file.jpg][IMG]http://i1122.photobucket.com/albums/l540/a5hm3dai/th_file.jpg[/IMG][/URL]

Netbios also:
[URL=http://s1122.photobucket.com/albums/l540/a5hm3dai/?action=view¤t=netbios.jpg][IMG]http://i1122.photobucket.com/albums/l540/a5hm3dai/th_netbios.jpg[/IMG][/URL]

I applied some fixes from Microsoft, but nothing helps. The router is ok other.
Strange thing is that 'DHCP Client' is running under Services window but in 'ipconfig /all' command looks like is off. Hmm
Thank you and please and any advice.