Why can't I login to the Boost Business App? Lili Follow 1. Please refer to the error in the pop out toolbar. If the error stated "Email address or password is wrong" it could be either you have keyed in the wrong email or password. 2. If you do not remember your email address used for Boost Merchant Account Registration or still unable to login, kindly contact us HERE and we will assist you further. 3. If email is correct, please refer to the next FAQ should you forgotten the password.