AS400ConnectionPool and closing connection

Hi
The connection created in AS400ConnectionPool and not
closed when i call close() method,
Here is my flow
I create AS400ConnectionPool as 
AS400ConnectionPool testPool = new
AS400ConnectionPool();
AS400 as400 =
testPool.getConnection("myas400","abc","abcpass");
AS400 as4001 =
testPool.getConnection("myas400","xyz","xyzpass");
testPool.close();

I see that the as400 connections created are still in
QUSRWRK subsytem and not cleared...

what may be the reason, i guess it used to work in
JTopen3.1 i upgraded to JTopen4.1 
Ashish


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