I'm having troubles installing FFXI onto my PC. I installed POL fine and I installed FFXI but when I try to open FFXI or the config it says "Final Fantasy XI config or Final Fantasy XI had stopped working" then closes and gives me the details

Problem signature:
Problem Event Name: APPCRASH
Application Name: FINAL FANTASY XI Config.exe
Application Version: 3.0.0.0
Application Timestamp: 41047e30
Fault Module Name: StackHash_4e5d
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 00000000
Exception Code: c0000005
Exception Offset: 7ffde000
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 2057
Additional Information 1: 4e5d
Additional Information 2: 4e5d5dc6aabf76cc679d707f73217047
Additional Information 3: c3f4
Additional Information 4: c3f4f21ff0efa95302412e4fece51da2

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Anyone have any idea how I can fix this?