Problem installing The Sims 3 Pets Expansion

I've followed all of the instruction in the Installation Guide, including putting the TS3W.exe and TSLHost.dll files in the Sims 3 bin not the Pets bin...still every time I try to play the game I get the error message "No disc found! Please insert The Sims 3 Pets game disc before proceeding." What did I do wrong?

//EDIT

Okay, so I followed the instructions for the Ultimate Fix and downloaded it along with the update, and I moved those #crack files into the Sims 3 game bin, but now everytime I try to start playing, my computer says that the game has stopped working. I don't know what to do now because I cannot play my game at all.

it happen to me the "the game has stopped working" but iv'e fixed it by downloading / updating to the latest patch which is 1.42 it was kinda stupid from me because you need to wait until the admin release the fix for it or crack so you can play "read the 1st thread" and after the admin released it download the latest patch and download the patch fix or crack from here witch will be added soon by the admins .

Hope it Helps