I reported this problem in 11.x a few months ago, but am still seeing it in 12:
On main PC running Media Server, my Verizon xv6700 PPC is docked via USB using the latest Activesync 4.2.0. Now neither of two remote PC's will connect. The dialogs that display on both are:
Locating Media Server...
Connecting to Media Server...
Cannot connect to Media Server...
... Killing and restarting MC/Media Server on the main PC does nothing. However, after undocking the PPC on the main PC both remote PC's can connect fine.
Media Center Registered 12.0.130 -- C:\Program Files\J River\Media Center 12\
Microsoft Windows XP Workstation 5.1 Service Pack 2 (Build 2600)
Intel Pentium 4 2782 MHz MMX / Memory: Total - 1047 MB, Free - 356 MB
Internet Explorer: 7.0.5730.11 / ComCtl32.dll: 5.82.2900 / Shlwapi.dll: 6.0.2900 / Shell32.dll: 6.0.2900 / wnaspi32.dll: 4.71 (0002) , ASPI for Win32 (95/NT) DLL, Copyright © 1989-2002 Adaptec, Inc. / Aspi32.sys: 4.71 (0002)
Ripping / Drive W: PIONEER DVD-RW DVR-106D Mode:ModeSecure Type:Auto Speed:Max
Digital playback: Yes / Use YADB: Yes / Get cover art: Yes / Calc replay gain: Yes / Copy volume: 32767
Eject after ripping: Yes / Play sound after ripping: No
Burning / Drive W: PIONEER DVD-RW DVR-106D Addr: 1:0:0 Speed:4 MaxSpeed:5 BurnProof:Yes
Test mode: No / Eject after writing: Yes / Direct decoding: Yes / Write CD-Text: Yes
Use playback settings: No /
Portable Device Info
Removed devices: