Jco Function issue : The initial password has expired (request a new one)

Hi Friends,

     Could you please help me to resolve this issue. I am able to start my session using  SAP Jco Start Action block. But while invoking the BAPI using

SAP JCo Function action block I am getting the below error. I am 100% sure that my credentials are correct. I am able to logon to ECC using SAP Front GUI.

I am using MII 14.0 patch SP4

Any help on this very much appreciated.

<Rowsets DateCreated="2014-07-22T12:33:49" EndDate="2014-07-22T12:33:49" StartDate="2014-07-22T12:33:49" Version="14.0 SP4 Patch 0 (Nov 22, 2013)">

    <FatalError>JCOProxy error: Problem retrieving JCO.Function object: The initial password has expired (request a new one)</FatalError>

</Rowsets>]]