Forum SLOW QUERY for social groups, pls help

[محروم.كوم]

Hello. I have a problem with my social groups.
I have imported from my old forum(custom made) all of my members to VB4.Also i have added them into a social group.
I have a problem with the index for the group section.
In my slow queries i found this:
# Time: 100401 10:41:21
# User@Host: forumul[forumul] @ localhost []
# Thread_id: 5363 Schema: forumul3
# Query_time: 13.193767 Lock_time: 0.000109 Rows_sent: 10 Rows_examined: 7576276 Rows_affected: 0 Rows_read: 0
SELECT user.*, socialgroupmember.groupid
,avatar.avatarpath, NOT ISNULL(customavatar.userid) AS hascustomavatar, customavatar.dateline AS avatardateline,customavatar.width AS avwidth,customavatar.height AS avheight
FROM socialgroupmember AS socialgroupmember
LEFT JOIN user AS user ON (socialgroupmember.userid = user.userid)
LEFT JOIN avatar AS avatar ON(avatar.avatarid = user.avatarid) LEFT JOIN customavatar AS customavatar ON(customavatar.userid = user.userid)

WHERE socialgroupmember.groupid IN (3,3)
AND 10 > (
SELECT COUNT( * )
FROM socialgroupmember AS socialgroupmember2
WHERE socialgroupmember2.groupid = socialgroupmember.groupid
AND socialgroupmember2.dateline > socialgroupmember.dateline
)
ORDER BY socialgroupmember.dateline DESC;

I have checked all off the tables from this query. I do not have any NULL ids or something like this. Do you know what seems to be the problem? __DEFINE_LIKE_SHARE__