Query:

insert into tbl_users (str_username, str_password, str_firstName, str_lastName, dt_dateCreated) values ('Animatus', 'passwd', 'David', 'Wells', 'November 20, 2005');

Error:

ERROR:  column "str_firstname" of relation "tbl_users" does not exist

Table:
tbl_users

Columns:
ser_userId
str_username
str_password
str_firstName
str_lastName
dt_dateCreated