mdx.dll --- treeview --> expandall

when i use mdx.dll 0.91c with command 'branch expandall' for treeview, mirc get crashed.
is it a bug? or its because of me :p

here is the command example:

on 1:dialog:mdx-test:sclick:*: {
if ($istok(12 13,$did,32)) {
did -i $dname 11 1 cb root
did -i $dname 11 1 branch $iif($did == 12,collapseall,expandall)
}
}

note: id 11, is a treeview listbox