Emulator

What's the problem?
The controllers except the first one doesn't work in the game ("Mario Kart Double Dash" & "Gotcha Force"). There are options for player second, third and forth in the GCPad option; when I connect PS2-Controllers by USB-Conversion-Adapter, they will be displayed as DInput/USB and also work. But when I start one of those two games the second, third and fourth controller doesn't work anymore.

Dolphin version with the problem (as it appears in the title bar, Ex.: "R7120" 32-bit & 64-bit

(optional) Dolphin version that does not have the problem:¶

Operating system and version:
Windows 7 Ultimate 32-bit & 64-bit

Game ID (as it appears in game properties, Ex.: "GZ2P01" or "RSBE01"):¶

Was the ISO a plain dump from disc, compressed and/or scrubbed?
The ISOs were scrubbed but not compressed.

Languages of the ISO files:
Mario Kart Double Dash (PAL-E) German language
Gotcha Force (NTSC-U) English language