diff -r b58b1294947a -r 1ea875759131 memspy/Driver/Kernel/Source/MemSpyDriverEventMonitor.cpp
--- a/memspy/Driver/Kernel/Source/MemSpyDriverEventMonitor.cpp	Mon Jun 21 22:45:06 2010 +0100
+++ b/memspy/Driver/Kernel/Source/MemSpyDriverEventMonitor.cpp	Thu Jul 22 16:50:07 2010 +0100
@@ -170,6 +170,7 @@
 TUint DMemSpyEventMonitor::HandleEvent( TKernelEvent aType, TAny* a1, TAny* /*a2*/ )
 	{ 
 	// TRACE_EM( Kern::Printf("DMemSpyEventMonitor::HandleEvent() - PRE WAIT"));
+	NKern::ThreadEnterCS();
 	Kern::MutexWait(*iLock);
 	// TRACE_EM( Kern::Printf("DMemSpyEventMonitor::HandleEvent() - POST WAIT"));
 
@@ -250,6 +251,7 @@
 
 	// TRACE_EM( Kern::Printf("DMemSpyEventMonitor::HandleEvent() - PRE SIGNAL "));
 	Kern::MutexSignal( *iLock );
+	NKern::ThreadLeaveCS();
 	// TRACE_EM( Kern::Printf("DMemSpyEventMonitor::HandleEvent() - POST SIGNAL "));
 
 	// Allow other handlers to see this event