我的板子在第一次接电脑时显示成功安装驱动程序（COM5），但是后来几次插上去之后电脑都没反应，用IAR下载程序就报错Thu Oct 25, 2012 12:52:31: Fatal error: Failed to initialize.  Check if hardware is connected. Check if drivers are installed. Try to restart the computer. Tools using the parallel port are not supported on Windows Vista   
求大神指导啊 此帖出自小平头技术问答