SR830 GPIB Driver to RS232 driver

I am using the SR830 driver from the link below(Labview 2012),

http://sine.ni.com/apps/utf8/niid_web_display.download_page?p_id_guid=240C113D3165071BE0440003BA7CCD71

I tried converting the GPIB driver to RS232 driver by replaving GPIB Write,Read with Serial Write,Read.Also by adding the the serial setting(Baud,Parity etc) at the Initialize vi.

After this when the run the Vi,i get ERROR-1074003951.The error says "The ID Query failed.  This may mean that you selected the wrong instrument or your instrument did not respond.  You may also be using a model that is not officially supported by this driver.  If you are sure that you have selected the correct instrument and it is responding, try disabling the ID Query.."

Please guide me.I wanted the Initialse to happen successfully,as without this vi all other Vis are failing.