How to create multi connections using JCO in different application servers

Hi all,
I want to connect to sap using jco from different servers at the same time.
There are 3 Jave application servers now. But I can only connect the sap servers using ONE server ( random ) at same time. It means when one server connect to sap , the other 2 servers CANNOT connect to sap.
Anyone konw what wrong?
Thanks in advance.
Ned

......

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How to create multi connections using JCO in different application servers

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