diff --git a/hwb1/src/hwb1/MyApplet.java b/hwb1/src/hwb1/MyApplet.java
index cdcc8de..53d276e 100644
--- a/hwb1/src/hwb1/MyApplet.java
+++ b/hwb1/src/hwb1/MyApplet.java
@@ -14,6 +14,7 @@ import javacard.framework.*;
  */
 public class MyApplet extends Applet {
     final static short SW_PIN_VERIFICATION_REQUIRED = 0x6301;
+    final static short SW_VERIFICATION_FAILED = 0x6300;
     final static byte PIN_TRY_LIMIT =(byte)0x03;
     final static byte MAX_PIN_SIZE =(byte)0x08;
     private byte[] authorName = new byte[] { 'M', 'a', 'n', 'u', 'e', 'l' };
@@ -127,7 +128,10 @@ public class MyApplet extends Applet {
 	                        break;
 	                    case 0x20:
 	                        length = apdu.setIncomingAndReceive();
-	                        pin.check(buffer, (short) ISO7816.OFFSET_CDATA, (byte)length);
+
+	                        if (!pin.check(buffer, (short) ISO7816.OFFSET_CDATA, (byte)length)) {
+	                        	ISOException.throwIt(SW_VERIFICATION_FAILED);
+	                        }
                             break;
 	                    default:
 	                        ISOException.throwIt(ISO7816.SW_INS_NOT_SUPPORTED);