diff --git a/arch/x86/scc/iRCCE_mailbox.c b/arch/x86/scc/iRCCE_mailbox.c
index 76424287..4fb439fa 100644
--- a/arch/x86/scc/iRCCE_mailbox.c
+++ b/arch/x86/scc/iRCCE_mailbox.c
@@ -218,7 +218,6 @@ int iRCCE_mail_check(int sender) {
 
 	/* disable interrupts */
 	flags = irq_nested_disable();
-
 	
 
 	// verify sender's ID
@@ -227,7 +226,10 @@ int iRCCE_mail_check(int sender) {
 			iRCCE_mailbox_check();
 			return 0;
 		}
-		
+
+		/* enable interrupts */
+		irq_nested_enable(flags);
+
 		return iRCCE_ERROR_ID;		
 	}
 	
@@ -250,7 +252,6 @@ int iRCCE_mail_check(int sender) {
 		return iRCCE_MAILBOX_EMPTY;
 	}
 
-
 	/* enable interrupts */
 	irq_nested_enable(flags);
 }
@@ -291,8 +292,6 @@ int iRCCE_mail_recv(
 			/* disable interrupts */
 			flags = irq_nested_disable();
 
-
-
 			help_header = iRCCE_mailbox_recv_queue[i].first;
 			
 			iRCCE_mailbox_recv_queue[i].first = 
diff --git a/arch/x86/scc/icc.c b/arch/x86/scc/icc.c
index a3571905..c42c4fc4 100644
--- a/arch/x86/scc/icc.c
+++ b/arch/x86/scc/icc.c
@@ -238,7 +238,7 @@ int icc_halt(void)
 	return 0;
 }
 
-#define ROUNDS 10000
+#define ROUNDS 100000
 #define CORE_A 0 		// sender
 #define CORE_B 4		// receiver 
 
@@ -282,7 +282,7 @@ static inline void icc_mail_check_tag(iRCCE_MAIL_HEADER* mail) {
 		break;
 	
 	case NOISE:
-		kprintf( "XXX " );
+//		kprintf( "XXX " );
 	default: 
 //		kprintf( "icc_mail_check_tag: uknown tag id %d\n", mail->tag );
 		break;
@@ -412,8 +412,8 @@ int icc_mail_ping_irq( void )
 	timer = rdtsc() - timer;
 
 	kprintf( "timer = %d\n", timer );
-	kprintf( "mail_pingpong needs in average %d msec (%d ticks)!\n",
-		timer/(2*ROUNDS*533), timer/(2*ROUNDS) );
+	kprintf( "mail_pingpong needs in average %d nsec (%d ticks)!\n",
+		timer*1000/(2*ROUNDS*533), timer/(2*ROUNDS) );
 
 	
 	irq_nested_enable(flags);
@@ -439,15 +439,15 @@ int icc_mail_noise() {
 	kprintf( "Hello from icc_mail_noise: my_ue = %d\n", my_ue );
 	kprintf( "num_ues = %d\n", num_ranks );
 	int count = 0;	
-	for( ;; ) {
-		kprintf( "SEND NOISE  - " );
+	for( ;; ++count ) {
+		if( !(count%1000) ) kprintf( "STILL ALIVE! " );
 		/* send a mail to each UE */
 		for( j=0; j<num_ranks; ++j ) {
-			if( (j == CORE_A) /*|| (j == CORE_B) */)
+			if( (j == CORE_A) /*|| (j == CORE_B)*/ )
 				continue;
 			
 			/* send noise mail */
-			iRCCE_mail_send(0, NOISE, 0, NULL, j);
+			iRCCE_mail_send(0, NOISE, 1, NULL, j);
 #ifdef _IRQ_NOISE_
 			icc_send_gic_irq(j);
 #endif
@@ -492,7 +492,7 @@ void icc_mail_check(int irq)
 	flags = irq_nested_disable();
 
 	if( irq == 1 ) {
-		for( i=0; i<2; ++i ) {
+//		for( i=0; i<2; ++i ) {
 			/* read status register */
 			irq_status_reg = (volatile uint64_t*)(FPGA_BASE + IRQ_STATUS + my_ue*8);
 			irq_status = irq_reset = *irq_status_reg;
@@ -511,8 +511,7 @@ void icc_mail_check(int irq)
 			/* reset status register */
 			irq_reset_reg = (volatile uint64_t*)(FPGA_BASE + IRQ_RESET + my_ue*8);
 			*irq_reset_reg = irq_reset;
-		}
-	
+//		}
 	}
 	else {
 		iRCCE_mail_check(iRCCE_MAILBOX_ALL);