selenium - While click event I done on a button, a message button not found is displayed -

here trying button , need click on button. when recorded same in selenium ide , exported selenium rc following code generated, here waiting button displayed , clicking on button. when run piece of code error element not found displayed.

for (int second = 0;; second++) {  if (second >= 60) fail("timeout");    try { if selenium.iselementpresent("//div[@id='46abec20-9c67-4a2d-a063-43cb2cb7c8b1']/div[3]/div[2]/button")))    break; } catch (exception e) {e.printstacktrace();}   thread.sleep(1000);   }  selenium.click("//div[@id='46abec20-9c67-4a2d-a063-43cb2cb7c8b1']/div[3]/div[2]/button"); 

the html code contains button is, save

i know has converted css format, not successful in doing that. can me out in this?