i have create a table in my database and i want from the site useing an sql statement to add on the table some information's

am trying the bellow command but i get an error

 INSERT INTO subscritption (email,from_site)
VALUES ('sdfsaf@hotmail.com','sf')

the error is : SQL Error: Incorrect syntax near 'sdfsaf@hotmail'.

both variables are nvarchar(256) and allow nulls.

i also have and an id variable that (int) and is (auto increment)

it return me an error and the error is

SQL Error: Incorrect syntax near 'sdfsaf@hotmail'.
Query String: INSERT INTO klinwtrapezigr.subscritption (email,from_site) VALUES (''sdfsaf@hotmail.com'',''sf'')

and the sql statement is
INSERT INTO klinwtrapezigr.subscritption (email,from_site)
VALUES ('sdfsaf@hotmail.com','sf')