The conviction of a man accused of wanting to become a suicide bomber was overturned Tuesday after a court in Scotland ruled that the trial judge did not properly instruct the jury.Prosecutors indicated they will not seek new charges against Mohammed Atif Siddique, 24, who was sentenced to eight years in prison in 2007.Prosecutors had said during the four-week trial that the Scottish college student had scoured Islamic extremist Web sites for information about bomb-making and other tactics. He was reported to have told other students he intended to become a suicide bomber.The appeals court found the trial judge had not properly explained the provisions of Britain's anti-terrorism laws when instructing the jury about how to assess whether Siddique was guilty of the main charge against him.