I am using same DLL in two applications and one is working fine and in another I am getting the Run-time error 453: Can't find entry point acmsdi_return_pointer in acmsdi.dll

Here is the piece which I am trying to ..

Declare Function Acmsdi_Return_Pointer Lib "acmsdi.dll" (workspace As Any) As Long

    options(0).option = ACMSDI_OPT_PWD_EXPIRING
    options(0).address = Acmsdi_Return_Pointer(pwd_exp_buffer)
    options(1).option = ACMSDI_OPT_END_LIST

Please help me.