Emulator

What's the problem?
Both first and second controllers are recognized in game pad setup. Only
first controller is recognized once games are loaded. The second controller
produces no functionality once in game. I receive two error messages. I am attaching the screenshots below.
Both controller 1 and 2 are recognized at the main program gui. Both controllers can be calibrated and function properly in the Wiimote settings menu. Once a game is loaded the second controller is no longer recognized as being present and has no functionality.

Dolphin version with the problem:
Dolphin SVN R 6494

Operating system and version:
Windows 7x64

Game ID (as it appears in game properties, Ex.: "GZ2P01" or "RSBE01"):
RMCE01 (Mario Kart Wii)
Build command-line (not on Windows):

Was the ISO a plain dump from disc, compressed and/or scrubbed?

Please provide any additional information below.
I'm using two wired xbox 360 controllers.
I have also tried in Donkey Kong Country Returns but I have the same issue.
Issue 2247 that was closed as invalid seems to be the same thing, but never resolved.