Mizuwyvern

Hello Everyone, I just re-downloaded the game after a few months of inactivity: when I opened it I saw there were not the red, blue and yellow servers anymore which were replaced by gold and silver. I used to play on blue server, but unaware of how the changes were made I just clicked on gold. When the beginning speech with Oak started I just closed the game and searched for information just to find out I had to enter the silver server, bun when I clocked to login ther it just said: "Invalid Username or Password" and as i'm sure they're not I suppose I cannot enter it because I clocked on gold server before. is there anything I can do to solve this problem? I'd rather not start the game from the very beginning. Thanks in advance