Follow these steps to sign in to DoubleClick Search:
In your browser, visit the DoubleClick Search homepage at http://www.google.com/doubleclick/search.
Enter your Google Account email address in the Email field.
Enter your password in the Password field.
The password field is case sensitive, so check your capitalization. Also make sure not to include any extra spaces.
Forgot your password? Choose a new one by clicking the Can't access your account? link below the sign-in area.