diff -r 34654679f262 -r 4ecc2f3690f4 drivers/win32/drivers_win32.cpp
--- a/drivers/win32/drivers_win32.cpp	Mon Jul 16 08:56:03 2007 +0200
+++ b/drivers/win32/drivers_win32.cpp	Tue Jul 17 18:20:50 2007 +0200
@@ -159,9 +159,7 @@
       {
       UNS8 res;
       driver_data* data = (driver_data*)fd0;
-      LeaveMutex();
       res = (*s_driver_procs.m_canSend)(data->inst, m);      
-      EnterMutex();
       if (res)
          return 0;
       }