diff --git a/programs/mutant-3/swen90006/passbook/PassBook.java b/programs/mutant-3/swen90006/passbook/PassBook.java
index 37b366a1beaa62401cf3abbe6c78a92c954e02f0..a794453e5602d4de02c96ce0c43c7f72e645960d 100644
--- a/programs/mutant-3/swen90006/passbook/PassBook.java
+++ b/programs/mutant-3/swen90006/passbook/PassBook.java
@@ -91,7 +91,7 @@ public class PassBook
 	    boolean containsLowerCase = false;
 	    boolean containsUpperCase = false;
 	    boolean containsNumber = false;
-	    for (int i = 0; i < passphrase.length(); i++) {
+	    for (int i = 0; i < =passphrase.length(); i++) {
 
 		if ('a' <= passphrase.charAt(i) && passphrase.charAt(i) <= 'z') {
 		    containsLowerCase = true;
@@ -145,7 +145,7 @@ public class PassBook
 	if (!passphrases.containsKey(passbookUsername)) {
 	    throw new NoSuchUserException(passbookUsername);
 	}
-	else if (sessionIDs.get(passbookUsername) == null) {
+	else if (sessionIDs.get(passbookUsername) != null) {
 	    throw new AlreadyLoggedInException(passbookUsername);
 	}
 	else if (!passphrases.get(passbookUsername).equals(passphrase)) {