t-sql query help

Hi,

I know this is a small issue but I am trying to figure this out for a while now. Please help me resolve the below issue.

CREATE TABLE TABLE1
(
ACCT_ID INT,
ACCT_TYPE VARCHAR(20)
)

INSERT INTO TABLE1 (ACCT_ID,ACCT_TYPE) VALUES (1,'A')
INSERT INTO TABLE1 (ACCT_ID,ACCT_TYPE) VALUES (1,'B')
INSERT INTO TABLE1 (ACCT_ID,ACCT_TYPE) VALUES (1,'C')
INSERT INTO TABLE1 (ACCT_ID,ACCT_TYPE) VALUES (1,'D')
INSERT INTO TABLE1 (ACCT_ID,ACCT_TYPE) VALUES (1,'E')

INSERT INTO TABLE1 (ACCT_ID,ACCT_TYPE) VALUES (2,'A')
INSERT INTO TABLE1 (ACCT_ID,ACCT_TYPE) VALUES (2,'B')

SELECT * FROM TABLE1

SELECT DISTINCT ACCT_ID FROM TABLE1 WHERE ACCT_TYPE IN ('A','B') AND ACCT_TYPE NOT IN ('C','D','E')

From the above TABLE1, I want only the ACCT_ID's which have 'A' , 'B'. I want to ignore the other IDs.

From the above table I should get the result as '2'. But I am getting both '1' and '2'

Please help me modifying my query,

Thanks in advance!!!