Millisecond Forums

Dear friends, I'm having a problem with a script in which participants have to press a picture to respond. Regularly, the moment I move the cursor, Inquisit will end the trial, without having had the opportunity to click a button.  . I have embedded a screen capture to show you what happens. I already tested whether have double quotes on the valid responses would make a change (e.g., "steal" or steal) but this does not seem to make a difference. 

Any suggestions would be appreciated!