hello i'm new to using orcad capture 9.2 so i'm having problems with the simulation. i'm trying to simulate this regulator circuit using transient analysis. then when i clicked run, the green circle appeared. I'm wondering maybe you need to tweak something first on the parameters of the LM317 before it starts working properly, or before the program recognizes that the LM317 is present. Voltage readings indicate that there is really something wrong. anyone can help me?