Getting 2 Errors Need Help :(

[d3adlythegame]

Database error in vBulletin 3.0.7:

Invalid SQL:
SELECT user.avatarid, user.avatarrevision, avatarpath, NOT ISNULL(avatardata) AS hascustom, customavatar.dateline
FROM vb3user AS user
LEFT JOIN vb3avatar AS avatar ON avatar.avatarid = user.avatarid
LEFT JOIN vb3customavatar AS customavatar ON customavatar.userid = user.userid
WHERE user.userid =
mysql error: You have an error in your SQL syntax. Check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 5

mysql error number: 1064
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Database error in vBulletin :

Link-ID == false, connect failed
mysql error:

mysql error number: 0
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Thanx.