DataBase Problem

I am having problem as :

Caused by: org.springframework.transaction.TransactionSystemException: Could
not roll back Hibernate transaction; nested exception is
org.hibernate.TransactionException: JDBC rollback failed

at
org.springframework.orm.hibernate3.HibernateTransactionManager.doRollback(Hi
bernateTransactionManager.java:677)

at
org.springframework.transaction.support.AbstractPlatformTransactionManager.d
oRollbackOnCommitException(AbstractPlatformTransactionManager.java:850)

at
org.springframework.transaction.support.AbstractPlatformTransactionManager.p
rocessCommit(AbstractPlatformTransactionManager.java:737)

at
org.springframework.transaction.support.AbstractPlatformTransactionManager.c
ommit(AbstractPlatformTransactionManager.java:678)

at
org.springframework.transaction.interceptor.TransactionAspectSupport.commitT
ransactionAfterReturning(TransactionAspectSupport.java:321)

at
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(Tr
ansactionInterceptor.java:116)

at
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(Reflect
iveMethodInvocation.java:171)

at
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopPro
xy.java:204)

at $Proxy57.generateReport(Unknown Source)

... 106 more

Caused by: org.hibernate.TransactionException: JDBC rollback failed

at
org.hibernate.transaction.JDBCTransaction.rollback(JDBCTransaction.java:204)

at
org.springframework.orm.hibernate3.HibernateTransactionManager.doRollback(Hi
bernateTransactionManager.java:674)

... 114 more

Caused by: java.sql.SQLException: Couldn't perform the operation rollback:
You can't perform any operations on this connection. It has been
automatically closed by Proxool for some reason (see logs).

at
org.logicalcobwebs.proxool.WrappedConnection.invoke(WrappedConnection.java:2
07)

at
org.logicalcobwebs.proxool.WrappedConnection.intercept(WrappedConnection.jav
a:87)

at
org.postgresql.PGConnection$$EnhancerByProxool$$4e6ef3b1.rollback(<generated
>)

at
org.hibernate.transaction.JDBCTransaction.rollbackAndResetAutoCommit(JDBCTra
nsaction.java:217)

at
org.hibernate.transaction.JDBCTransaction.rollback(JDBCTransaction.java:196)

... 115 more

Pls guide me.Thanks you.