Server Rules - regeneration not having an effect?

[ChaosSlayer]

I have been trying to increse default regeneration in my server rules.
By default its set to 100. So I set it to 200 (this should double the effect) but not realy noticing an increase.
Set this all way to 1000.. but can't realy tell how fast my char is regenerating, cuase numbers keep jumping. I managed to time it to rathly 200hp regenerated in 4 min... Thats can't posibly be if i am going at x10 the rate

Could someone please clearfy this for me? Does feature actualy working?

Also on Xp modifier- to give people more Xp - does this has to go UP or DOWN?

thank you