Yui - split button & menu issue


I am unable to click on the split button and only the button is
highlighting. Please help on this and find the below details and
attached samples.

html source:

Page File:
element(:quotedrop){$browser2.span(:class => “yui-button
yui-split-button”, :id => “PEGA_SPLITBTNpyAdvFindOpt”)}
element(:valueselect){$browser2.cell(:id => “yui-gen6”, :index => ‘0’)}

Step File:
process_page.quotedrop.fireEvent(“onclick”) rescue “”

Please refer the attached split button snaps and view source details.

Let me know if you need any further details.