Tests on jdk 1.7 failed

Tests passed on jdk 1.6. On jdk 1.7 they failed
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Test set: quickfix.SessionTest
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Tests run: 47, Failures: 3, Errors: 0, Skipped: 0, Time elapsed: 1.197 sec <<< FAILURE! - in quickfix.SessionTest
testResendRequestMsgSeqNum(quickfix.SessionTest) Time elapsed: 0.006 sec <<< FAILURE!
java.lang.AssertionError: Session should be logged out since seqnum too low!
at org.junit.Assert.fail(Assert.java:93)
at org.junit.Assert.assertTrue(Assert.java:43)
at org.junit.Assert.assertFalse(Assert.java:68)
at quickfix.SessionTest.testResendRequestMsgSeqNum(SessionTest.java:1172)

testAcceptorRelogon(quickfix.SessionTest) Time elapsed: 0.002 sec <<< FAILURE!
java.lang.AssertionError: null
at org.junit.Assert.fail(Assert.java:92)
at org.junit.Assert.assertTrue(Assert.java:43)
at org.junit.Assert.assertFalse(Assert.java:68)
at org.junit.Assert.assertFalse(Assert.java:79)
at quickfix.SessionTest.testAcceptorRelogon(SessionTest.java:1632)

testLogoutMsgSeqNumTooHighOrLow(quickfix.SessionTest) Time elapsed: 0.001 sec <<< FAILURE!
java.lang.AssertionError: expected:<3> but was:<4>
at org.junit.Assert.fail(Assert.java:93)
at org.junit.Assert.failNotEquals(Assert.java:647)
at org.junit.Assert.assertEquals(Assert.java:128)
at org.junit.Assert.assertEquals(Assert.java:472)
at org.junit.Assert.assertEquals(Assert.java:456)
at quickfix.SessionTest.testLogoutMsgSeqNumTooHighOrLow(SessionTest.java:418)