LR free version recording for Thick application

Hi ,

I am doing POC on Thick client desktop application bulid with C application  .It is heavy client taking load and launch for application 8 mins due to the data retrival from DB..

while doing scripting in LR12.5 free version, it taking more than 2 hour to login and launch (stil not able to record complete step).. why ?..

what are protocal can be used for this?

My application install in my desktop with admin rights.