problem with variables in plugin

[Schluml]

hi,

i've got a plugin with a query which is gettin the threads in different forums for each user.

My problem is, i save the query result in a variable and want to print it in the postbit, but the variable seems to be empty in postbit. As hook i'm using
"showthread_postbit_create"

query code:

PHP Code:

$tresult = $vbulletin->db->query_first("SELECT COUNT(*) AS anzahl FROM ". TABLE_PREFIX ."thread WHERE forumid IN (1,4,8) AND postuserid=".$post['userid'].""); 


in postbit i'm using:

PHP Code:

$result[anzahl] 


but, nothing happens...

the qery seems to be ok, i tested it.

so, whats the problem?

P.S. my english isnt perfect, hope u understand me