Exception while connecting to SAP from Java

Hi,
When my application tries to connect to SAP R/3 system, I am getting the following exception:
java.lang.ExceptionInInitializerError: JCO.classInitialize(): Could not load middleware layer 'com.sap.mw.jco.rfc.MiddlewareRFC'
JCO.nativeInit(): Could not initialize dynamic link library sapjcorfc [no sapjcorfc in java.library.path]. java.library.path [C:\Program Files\Java\jdk1.5.0_11\bin;.;C:\WINNT\system32;C:\WINNT;C:\WINNT\system32;C:\WINNT;C:\WINNT\System32\Wbem;C:\Program Files\Windows Imaging\] ];
---> nested java.rmi.ServerError: Unexpected Error; nested exception is:
java.lang.ExceptionInInitializerError: JCO.classInitialize(): Could not load middleware layer 'com.sap.mw.jco.rfc.MiddlewareRFC'
JCO.nativeInit(): Could not initialize dynamic link library sapjcorfc [no sapjcorfc in java.library.path]. java.library.path [C:\Program Files\Java\jdk1.5.0_11\bin;.;C:\WINNT\system32;C:\WINNT;C:\WINNT\system32;C:\WINNT;C:\WINNT\System32\Wbem;C:\Program Files\Windows Imaging\]
Please help me with your guidance.
Regards,
Blessy.

Which application is trying to connect to SAP. Give us your SAP landscape..whether it was working beofre and suddenly stoped. or you are in the middle of configuration
Reagards
Umesh K

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