Relation feature in PHP MyAdmin - how to activate?

i am using xampp Version 1.7.1 . my friend and i are using this for a long time… The problem is, i can’t use the designer view for the tables and it seems like the relation feature is not activated…my friend’s PHP myADMIN is working just fine… HOW can i activate the relation feature and the designer view?

tnx very much:)