Join Only Returns The Read Rows :|

Hi all,

I am trying to build a association table (t2) to store a list of users
have viewed an item in my records table (t1). My goal is to send the
UserID parameter to the query and return to the user a read / not read
marker from the query so I can handle the read ones differently in my
.net code. The problem is that I cannot work out how to return anything
but the read data to the client. So far my stored proc looks like this

DECLARE @UserID AS Int -- FOR TESTING
SET @UserID = 219 -- FOR TESTING

SELECT t1.strTitle, t1.MemoID, Count(t2.UserID) AS ReadCount,t2.UserID

FROM t1
LEFT OUTER JOIN
t2 ON t1.MemoID = t2.MemoID

WHERE t2.UserID = @UserID

GROUP BY t1.MemoID, t1.strTitle,t2.UserID

It works fine but only returns those records from t1 that are read. I
need to return the records with null values also! I may have built the
assoc table wrong and would really appreciate some pointers on what I
am doing wrong. (assoc table has rID, MemoID and UserID columns)

Please help!

Many thanks