db_dataobject joinAdd: xxx has no link with yyy

hi everybody, i have a problem using a joinAdd. It works fine on my development-machine but it doesn't work on the production-server. if i turn debug on, it says: dataobjects_reisen: ERROR: joinAdd: reiselaender has no link with reisen i used the following php-code: $reisen = MyDataObject::factory('Reisen'); $reiselaender = MyDataObject::factory('Reiselaender'); $reisen->whereAdd('kategorie_id = 1'); $reisen->joinAdd($reiselaender, "LEFT"); $reisen->selectAs(); $reisen->selectAs($reiselaender, 'reiselaender_%s'); $reisen->find(); a *.links.ini file exists and looks like this: [reisen] kategorie_id = kategorie:id reiselaender_id = reiselaender:id [kategorie] gid = navigation:id [gruppenwerte] reise, match id column and so on reise_id = reisen:id [gruppenpreise] reise_id = reisen:id [saisonzuschlaege] reise_id = reisen:id [gruppenreisetermine] reise_id = reisen:id [gruppenausfluege] reise_id = reisen:id [frei] reise_id = reisen:id any ideas? best regards, Thomas -- Geschenkt: 3 Monate GMX ProMail + 3 Top-Spielfilme auf DVD ++ Jetzt kostenlos testen http://www.gmx.net/de/go/mail ++