WSB crashes

[ka-la]

Problem signature:
  Problem Event Name:   APPCRASH
  Application Name:   VistaStyleBuilder.exe
  Application Version:   1.5.0.3
  Application Timestamp:   4adbcc61
  Fault Module Name:   kernel32.dll
  Fault Module Version:   6.1.7600.16385
  Fault Module Timestamp:   4a5bdaad
  Exception Code:   c0000005
  Exception Offset:   00097f28
  OS Version:   6.1.7600.2.0.0.256.48
  Locale ID:   1061
  Additional Information 1:   0a9e
  Additional Information 2:   0a9e372d3b4ad19135b953a78882e789
  Additional Information 3:   0a9e
  Additional Information 4:   0a9e372d3b4ad19135b953a78882e789

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when i try to test theme.