thanks StGaensler, I don't know if it's vbulletin 3.6.7 or whatever, but all I get is the default grey 1px border, no matter how many settings I tweak and change.
I've tried
.stg_table {border: 1px solid #000; padding: 5px;}
table.stg_table {border: 1px solid #000; padding: 5px;}
.stg_table_table {border: 1px solid #000; padding: 5px;}
nothing is working to change the border colors

could it be a vbulletin cache problem? Anything I can reset in the maintenance area? I've evern tried to uninstall the plugin and reinstall it, that doesn't help either. Danke f?r die Hilfe StGaensler.