Addon stability in 2005 SP 01

Hi All

I have found failures of stability in my developments in 2005 SP01.

I developed a new AddOn structure, my new structure have a solution

by .NET with very proyects.

This structure have 2 Dll developed and 1 exe file (this used the dll).

My problem is that the develoment some time when conected Di Api generated

the "unkown session", i not find reason for error.

Any body have the same problem?

Other problem I have is the user works with AddOn load in SBO, and when

time passes the AddOn disconnect.

I accept any suggest.