Popup sms reply going to unlock screen GS2

Got my Galaxy s2 a few weeks ago and have been using Handcent, read somewhere the Gosms was better so I installed it and gave it a try, since installing it if I get a sms popup, I reply to it and press send, it goes to my unlock screen and hangs there for 10-15 seconds instead of turning the screen off.

Thinking it was Go-sms I uninstalled it and went back to Handcent, any advice on how to make my screen turn off as soon as I reply to a locked screen popup text? Thanks.