DB_DataObject joinAdd

Hi! Excited I found out that DB_DataObject's joinAdd supports a defineable column now. But - I cannot understand why I cannot do whatever I want with it. I keep getting a "You cannot target a join column in the 'link from' table (kia_seminaranmeldung). Either remove the fourth argument to joinAdd () ((ad2.pID=semanm.pID)), or alter your links.ini file." That is not really a help but rather very annoying as it will probably force me to use a raw query once more (which is uncool as I cannot configure that optionally as good as a real DB_DataObject query) I do this: $ad2->joinAdd($semanm2, 'LEFT','semanm2','(ad2.pID=semanm2.pID)'); $verb->joinAdd($ad2, 'LEFT', 'ad2'); $fidpid->joinAdd($verb, 'LEFT'); $ad->joinAdd($fidpid, 'LEFT'); $semanm->joinAdd($ad); which is supposed to Link semanm2 to ad2 but instead semanm is linked to ad (which is the same table that is used twice in the query - the second time renamed to ad2) I would like to get: SELECT foo, bar, baz FROM kia_seminaranmeldung INNER JOIN kia_adressen ON kia_adressen.pID = kia_seminaranmeldung.pID LEFT JOIN kia_fidpid ON kia_fidpid.pID = kia_adressen.pID LEFT JOIN kia_familienverband ON kia_familienverband.fID = kia_fidpid.fID LEFT JOIN kia_adressen AS ad2 ON ad2.pID = kia_familienverband.pID LEFT JOIN kia_seminaranmeldung sem2 ON ( ad2.pID = sem2.pID AND sem2.sID = kia_seminaranmeldung.sID ) I know that looks strange but it gives me the right result ... and you haven't seen the where statement :-) How can I tell DB_DataObject to either link the table properly or use a real custom column? Of course semanm2 and ad2 have a link entry in my database.ini ... Maybe the renameing of the tables confuses the object ... regards Daniel