load runner controller (wlrun.exe) crashes

When i create a senario of a vugen truclient web script and let it run with 3 users it will crash controller.

i get :

Problem signature:

  Problem Event Name:                      BEX

  Application Name:                           Wlrun.exe

  Application Version:                        12.50.249.0

  Application Timestamp:                  55b4ae81

  Fault Module Name:                        trans_ext.dll

  Fault Module Version:                     12.50.249.0

  Fault Module Timestamp:               55b4abb8

  Exception Offset:                              00008d44

  Exception Code:                               c0000409

  Exception Data:                                00000000

  OS Version:                                       6.1.7601.2.1.0.18.10

  Locale ID:                                          1033

  Additional Information 1:                b19e

  Additional Information 2:                b19ed3314981ba0cd22900c71d63cabc

  Additional Information 3:                632f

  Additional Information 4:                632fc979bb975c8ef2a94c252de25bbf

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DEP is AlwaysOff

UAC is off

user is local admin

script logs in, logs out nothing more

Any suggestions?

I use community ed 12.50