Improved Invisibility Options

[Machiavelli]

Yeah i know. Everbody is thinking...."Oh god, not again" but I have one or two simple little question about the following situation:

You are invisible, enemy fails the spell resistance test but he wants to attack you anyway. Acc. to the rules he has to swap from agility to intuition for this. If he wants to SHOOT you, he also has the modifier of -6 dice for hidden object. But what if he wants to hit you in melee combat? Same rules? My GM says that the core book only says: if you want to attack an invisible char. you have to apply the modifier for hidden enemy, but this modifier is only mentioned in ranged combat. If you see the modifiers in the melee section, there is no equivalent (at least it should have been mentioned there, or not?).

Is there possibly another section in the book that clarifies this "problem"? For me as player it would be great if this modifier is also used in melee combat but i need some help to persuade our GM^^