Database INSERT Fejl

Jeg får denne fejl ved et af mine dokumenter;

Error Type:
Microsoft JET Database Engine (0x80040E10)
No value given for one or more required parameters.
/dc0_9/forum/dopost.asp, line 33

Linie 33 ser sådan ud;
'Insert post into tblPosts
Conn.Execute _
    "INSERT INTO tblPosts (" & vSQLFields & ") VALUES (" & _
    "'" & post_board & "'," & _
    post_parent & "," &_
    "'" & post_author & "'," & _
    "'" & post_subject & "'," & _
    "'" & post_content & "'," & _
    "#" & Now() & "#," & _
    post_locked & "," & _
    post_sticky & ")"

Hvad kan der være galt?