Hi Rob and Pete,
IvAp has a special mode where it fills the TCAS tables of FSUIPC, this is probably what you are looking for.
Rob: it is of no use posting issues or support requests regarding IvAp on any other forum then the official support forums located at http://forum.ivao.org/We don't read all those forums and maybe other people don't know of our software and the issues will probably not be caused by them ;)
Take a look at our forum, we'll answer issues there ;)
Pete: The access key for IvAp you've probably received is an old version, we created a new version that restarted from zero, the key IvAp uses is the FSInt one you supplied a few months ago i think.
Greetz