dnd 4e – Does multi-classing provides weapon proficiency of the guest class?

As a Wizard, multi-classing into Fighter (through Multi-class Feat), would the Fighter multi-class provide the weapon proficiencies that the Fighter otherwise gains from its class?

I found no evidence of this sort, but I would be happy to gain clarification. I check PHB 1-3, but maybe there is an update somewhere in Dungeon/Dragon magazines and so forth…

Thank you!