need help.... after install acad 3plan in my computer last nite.... yes success... but can't work....i click acad can but few minute. stop automatic... please some body here help me......  

You installed AutoCAD 2012 on your computer.  It work three times then stopped working?  Did you get an error message of any kind?  If so what did it say?  What were you attempting to do when AutoCAD stopped working?  Were you just trying to open a drawing?  Were you using a specific command?  We need more details.