Error Message Navigation in Webdynpro Abap

Hi Experts,

I am displaying an Error Message in my application . But, After that I am not able to Navigate and perform action

in my application.

Can u suggest me an idea for the same .

I have used the below code :

      concatenate 'More than 24 hours entered for personnel number' lv_pernr 'on' l_ex_date into l_string separated by space.
" Start Dele Kar
    call method lo_message_manager->report_attribute_error_message
    exporting
      message_text      = l_string
      element           = lo_el_timesheet
      attribute_name    = 'DATE1'
      cancel_navigation = abap_true .

Regards,

Karthik S