I've seen the reply to this question in the forum however that did not solve my problem. From my desktop on Windows 7 and updated router, no firewalls, I'm seeing only the WMP on PMS. On rare occasions it has shown PS3. The Trace is below:
INFO 2013-03-26 21:16:02.438 [main] AviSynth is not installed. You cannot use avsmencoder as a transcoding engine.
INFO 2013-03-26 21:16:02.858 [main] Using address /192.168.1.19 found on network interface: name:eth3 (Intel(R) PRO/100 VE Network Connection)
INFO 2013-03-26 21:16:02.859 [main] Created socket: /192.168.1.19:5001
INFO 2013-03-26 21:16:03.288 [main] Using the following UUID configured in PMS.conf: 50eda538-32e0-38da-abba-1bcfcc8c2e0b
INFO 2013-03-26 21:16:08.721 [main] The server should now appear on your renderer
INFO 2013-03-26 21:16:10.813 [UPNPHelper] No IP filter specified, access granted to /192.168.1.19
INFO 2013-03-26 21:16:11.052 [pool-7-thread-1] Checking IP: 192.168.1.19 for WMP
INFO 2013-03-26 21:16:11.054 [pool-7-thread-1] Renderer WMP found on this address: Anu-Desktop.mshome.net (192.168.1.19)
Curiously however, I'm able to see PMS at once from my laptop on the same router and network, whose trace is as below:
INFO 2013-03-26 13:02:10.996 [main] AviSynth is not installed. You cannot use avsmencoder as a transcoding engine.
INFO 2013-03-26 13:02:11.124 [main] Using localhost address
INFO 2013-03-26 13:02:11.125 [main] Created socket: 0.0.0.0/0.0.0.0:5001
INFO 2013-03-26 13:02:11.986 [main] Using the following UUID configured in PMS.conf: 20071381-334b-4902-b33f-c519e36209e3
INFO 2013-03-26 13:02:12.355 [New I/O server worker #1-1] No IP filter specified, access granted to /192.168.1.16
INFO 2013-03-26 13:02:12.379 [pool-7-thread-1] Checking IP: 192.168.1.16 for Panasonic
INFO 2013-03-26 13:02:14.607 [New I/O server worker #1-2] No IP filter specified, access granted to /192.168.1.15
INFO 2013-03-26 13:02:14.610 [pool-7-thread-2] Checking IP: 192.168.1.15 for Playstation 3
INFO 2013-03-26 13:02:17.321 [main] The server should now appear on your renderer
INFO 2013-03-26 13:02:17.360 [pool-7-thread-1] Renderer Panasonic found on this address: 192.168.1.16
INFO 2013-03-26 13:02:19.533 [pool-7-thread-2] Renderer Playstation 3 found on this address: 192.168.1.15
INFO 2013-03-26 13:02:21.540 [pool-7-thread-2] Address /192.168.1.15 has an estimated network speed of: 26 Mb/s
INFO 2013-03-26 13:02:30.831 [UPNPHelper] No IP filter specified, access granted to /192.168.1.6
INFO 2013-03-26 13:09:07.140 [New I/O server worker #1-5] No IP filter specified, access granted to /127.0.0.1
INFO 2013-03-26 13:09:07.162 [pool-7-thread-3] Checking IP: 127.0.0.1 for WMP
INFO 2013-03-26 13:09:07.272 [pool-7-thread-3] Renderer WMP found on this address: 127.0.0.1
INFO 2013-03-26 13:09:07.324 [New I/O server worker #1-6] Another renderer like WMP was found!
INFO 2013-03-26 13:09:07.332 [pool-7-thread-4] Checking IP: 192.168.1.6 for WMP
INFO 2013-03-26 13:09:07.333 [pool-7-thread-4] Renderer WMP found on this address: RICHA-HP (192.168.1.6)
INFO 2013-03-26 18:15:59.629 [UPNPHelper] No IP filter specified, access granted to /192.168.1.5
any help is greatly appreciated. I've checked if any services were missing, or setting in network center, but no difference. However, on the desktop IPv6 shows 'No Internet Access' while on laptop is shows 'Internet'.