report_attribute_error_message not highlighting the field?

Hi Experts,

I have a view, where i have two table views.

1. Header

2. Line items

i have a button ' SAVE' - on save i am validating and displaying error message using message manager -> report_attribute_error_message.

Thought i am passing the correct element and attribute name, Attribute in the header table is not being highlighted as error.

Error message is issued.

What could be the problem?

{code

      CALL METHOD wd_this->m_msg_mgr->report_attribute_error_message

        EXPORTING

          message_text = lv_text

          element      = lo_el_node_hdr.

          attribute_name = 'EQUNR'.

code}

What could be the problem? any help is highly appreciated.

Ajay