We have the same development environment. I have always used the
UserSession DM for all of my data access components. I use a
TIBSession (make sure it is frst in the creation order) in conjunction
with TIBConnction and TIBTransaction components for the connection to
the DB (They will automatically use the TIBSession component as long
as it is first in the creation order). I typically use TIBOQuery
components for the datasets. This has worked well for me. The only
difference is that I am compiling as a standalone executable as
opposed to an apache dll, but that should have no bearing on this
issue you are having!