new members equals old memers being deleted?

if someone could help me with this i would really by happy. i have new memebrs joing alomst everyday but it seems as though, once new members join old members are getting deleted. my forum is intergrated so it shows the accurate count of members, but my site stats does not. the difference is around 20 members or so. this number keeps going down every week on my site stats. please help.

I think theres still a bug with site stats, I remove the block since its inacurate, showing only 2 members online while there are 20, now about your old member deletion visit dbase pruning, you might want to edit the configuration. Admin>Settings>database pruning.

Hope this will help

 thank you! i think that was the problem