pokemon soulsilver help :/

I've beaten the first gym leader and them i wanted to go to the next town but there is a guy and obstructs the passage -.-
What do i have to do?Sorry for my bad english
(i'm from germany)

go up to the sprout tower!

Replying to #2

But i've already been there...

nemesis11 · #2go up to the sprout tower!

you have to do that before beating the gym... go to the pokemart and get the egg from prof. elms aide

Yes, get the egg, i forgot this too.