diff --git a/AT32F425/DAPLink.uvoptx b/AT32F425/DAPLink.uvoptx
index 6d5547f..3244069 100644
--- a/AT32F425/DAPLink.uvoptx
+++ b/AT32F425/DAPLink.uvoptx
@@ -246,7 +246,7 @@
       <GroupNumber>1</GroupNumber>
       <FileNumber>2</FileNumber>
       <FileType>1</FileType>
-      <tvExp>0</tvExp>
+      <tvExp>1</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
       <bDave2>0</bDave2>
       <PathWithFileName>.\src\descriptor.c</PathWithFileName>
diff --git a/AT32F425/src/hid_transfer.c b/AT32F425/src/hid_transfer.c
index 30e1ea6..ffc6249 100644
--- a/AT32F425/src/hid_transfer.c
+++ b/AT32F425/src/hid_transfer.c
@@ -97,7 +97,6 @@ static usb_sts_type class_setup_handler(void *udev, usb_setup_type *setup)
 			break;
 		
 		default:
-			usbd_ctrl_unsupport(usbd);
 			break;
 		}
 		break;
@@ -175,9 +174,7 @@ static usb_sts_type class_ept0_rx_handler(void *udev)
   * @retval status of usb_sts_type
   */
 static usb_sts_type class_in_handler(void *udev, uint8_t ept_num)
-{
-	usbd_core_type *usbd = (usbd_core_type *)udev;
-	
+{	
 	switch(0x80 | ept_num)
 	{
 	case HID_INT_IN_EP:
diff --git a/AT32F425/src/usb_conf.h b/AT32F425/src/usb_conf.h
index e4c50ea..c9cad39 100644
--- a/AT32F425/src/usb_conf.h
+++ b/AT32F425/src/usb_conf.h
@@ -9,10 +9,10 @@
 
 
 #define USBD_RX_SIZE    	128
-#define USBD_EP0_TX_SIZE	64
-#define USBD_EP1_TX_SIZE	64
-#define USBD_EP2_TX_SIZE	64
-#define USBD_EP3_TX_SIZE	64
+#define USBD_EP0_TX_SIZE	24
+#define USBD_EP1_TX_SIZE	20
+#define USBD_EP2_TX_SIZE	20
+#define USBD_EP3_TX_SIZE	20
 #define USBD_EP4_TX_SIZE	20
 #define USBD_EP5_TX_SIZE	20
 #define USBD_EP6_TX_SIZE	20