For help, I recently tested a few games on my X2, but some of them lack the C key

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    • For help, I recently tested a few games on my X2, but some of them lack the C key

      As mentioned in the question, I have tested the super Street Fighter series, BlazBlue series, P4U series and KOF series. Strangely, the super Street Fighter series and BlazBlue series have normal buttons, but both P4U series and KOF series lack the C key.Do any friends know the reason and the solution?Is it the configuration file in the game or something else? I have tried two IO boards, one is Sega's 838-13683-93 and one is Naomi's without brand. Both boards have the same problem.
      Looking forward to your help. ;(