FAILED: Insufficient memory - BSAFE pool is full

Hello all, When I try to register new users with Domino Admin i keep on getting the following error message : FAILED: Insufficient memory - BSAFE pool is full

I have see one or two posts about this issue but they are either un answered or the solution(delete cache.ndk and rename desktop.8) do not work for me

has any one else seen this issue and does any one know how to fix this?