Whenever I try to initiate the 'join confederation' option under diplomacy I get an immediate crash to desktop. It displays this message:

Problem signature:
  Problem Event Name:	BEX
  Application Name:	rome2.exe
  Application Version:
  Application Timestamp:	522a2d8b
  Fault Module Name:	StackHash_015f
  Fault Module Version:
  Fault Module Timestamp:	00000000
  Exception Offset:	3c708644
  Exception Code:	c0000005
  Exception Data:	00000008
  OS Version:	6.1.7601.
  Locale ID:	3081
  Additional Information 1:	015f
  Additional Information 2:	015f4c2791eefa2f713867d7a298b378
  Additional Information 3:	89eb
  Additional Information 4:	89eba422c0fbbbbf65a18881f02a71ca

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My DirectX output: