V-beam laser settings for small red surgical scar.

I've had a red small surgical scar for 3 years already on my face. I've had 5-vbeam laser settings at 10.5joules 10ms 10 with no bruising and no results. I've also had 2 Excel-V laser at settings: 1. 7mm 8ms 5.6j 2. 7mm 4ms 5.6j No results and no bruising. It seems like doctors do not understand the settings of their lasers. Can any doctor recommend the correct settings? I know some pin point bruising will be the correct settings to burst the blood vessels.