diff --git a/drivers/net/mmnif.c b/drivers/net/mmnif.c
index cecacee2..2636ceeb 100644
--- a/drivers/net/mmnif.c
+++ b/drivers/net/mmnif.c
@@ -849,11 +849,11 @@ err_t mmnif_init(struct netif* netif)
 		DEBUGPRINTF("mmnif init(): allocating shared memory failed\n");
 		return ERR_MEM;
 	}
-	memset(mmnif->rx_buff, 0, sizeof(mm_rx_buffer_t) + MMNIF_RX_QUEUELEN* MMNIF_RX_BUFFERLEN);
+	memset(mmnif->rx_buff, 0, mpb_size);
 
 	/* init the lock for the hdr
 	 */
-	sem_init(&mmnif->rx_buff->lock,1);
+//	sem_init(&mmnif->rx_buff->lock,1);
 
 	/* inform via interrupt should be the dafault
 	 */
diff --git a/kernel/tests.c b/kernel/tests.c
index 5290289a..efea5da7 100644
--- a/kernel/tests.c
+++ b/kernel/tests.c
@@ -221,7 +221,7 @@ void* client_task(void* e)
 	struct sockaddr_in pin;
 	struct hostent *hp;
 
-	sleep(2);
+	sleep(1);
 
 	/* fill in the socket structure with host information */
 	memset(&pin, 0, sizeof(pin));