Hi Lee.

If you are flying around in circles instead of capturing the ILS/GS, then I need to know if the end of the route is missing. Looking through the LEGS page, does the route end where the STAR should begin? This could explain the problem.

Another question. Are you wanting to change from one STAR and Runway (which can happen when using real weather like REX or AS2012) to another when using real weather? If that's what you want to do, I usually have the RTE1 copied into RTE2 and I change the STAR and Runway in there and then Activate RTE2. If you are in the middle of the STAR, then switching to RTE2 might end up wanting to turn you back, 180 degrees, to the start of the STAR in RTE2. It is best to use Heading HOLD when switching from RTE1 to RTE2 (and vice-verse), then make any changes in the LEGS page that might be needed prior to turning LNAV back on.

Hope this helps