Akila

Although @spesimen is right in his reply , I believe it added more confusion to what you already have and not totally answered your questions.
 
1. that is correct you don't normally file a SID/STAR as part of the flight plan, although VOXAtc supports those if you do decide 
to file. In general SID/STAR are based on the RWY in use and the air route which you came from.
 
2. as to your "complicated" question on how to set your plan to include the waypoint which in return trigger a SID/STAR?
don't sweat over it. file a flight plan from the Airport, up until the airport (usually the airport VORs), 99% of the times the SID/STAR waypoint will be in it already,
under the assumption there is a SID/STAR for that airway. VOX doesn't needs the waypoint to be at the beginning/end of the flight plan to assign you a SID/STAR.
it just needs to contain it.
 
99% of the flight plans you will download from all kind of FP tools and websites, such as vroute, etc., contain the SID/STAR waypoint in them already.

Thanks guys for the direction you gave me.
I managed to solve the problem based on the info you gave me here.
the Solution was very simple in the end.
Indeed it was related to FSUIPC.
all I needed to do really is to create a new Profile for the T7.
once that was out of my way , I could play around with the Axis without damaging other plane.
 
all I had to do really was to change the settings of my Throttles, rudder, Elevator, Aileron to "Axis xxxx set" (and make sure to "send to FS as normal Axis" -the middle option)
e.g. Throttle(s):  from "Throttle 1"  to "Axis Throttle 1 set"
that solved the issue for everything.
 
Before (had the Problem):

 
After (fixed the Problem):