Got unexpected value in TDS response at offset

Am using Java, hibernate, sqlserver 2008 R2, Jboss ,
getting this exception,
    WARNING [com.microsoft.sqlserver.jdbc.internals.TDS.Reader] (pool-26-thread-7) ConnectionID:4 TDS header contained invalid packet length:12590; packet size:8000
2013-05-21 15:59:15,777 SEVERE [com.microsoft.sqlserver.jdbc.internals.TDS.Reader] (pool-26-thread-7) ConnectionID:4 got unexpected value in TDS response at offset:7992 2013-05-21 15:59:15,808 ERROR [STDERR] (pool-25-thread-2) Exception in thread "pool-25-thread-2"      2013-05-21 15:59:15,808 ERROR [STDERR] (pool-25-thread-2) org.hibernate.Tra ...