not able to login using the script

[nalam@zynga.com]

i am trying to login zynga.com using following script.

Navigate http://www.zynga.com
setValue id=username nalam@zynga.com
setValue id=password Hello#1234
click className=zui_zdc_common_form_submitButton

it enters the username and password in the textbox, but after clicking "sign In", it resets everything. can somebody please go to to zynga.com and try to make it run.
screenshots :
http://www.webpagetest.org/screen_shot.p...1&cached=0

Thanks!!!