When I'm practising the "Populating an ArrayCollection with retrieved data" exercise in day 2, and adding a result event in <s:HTTPService ...> MXML tag, I pressed the Ctrl + Spacebar, but no content assist appeared. It only displayed "no proposals". When I do the same thing in other tags, the content assist tool works fine. Could someone tell me why that happens? BTW, my flash builder version is the lastest version, that is 18.104.22.1687662, and my OS is Window XP. Thanks in advance.