what is wrong with this code - get taxonomy from theme option

[luis12]

I need to query posts from custom post taxonomy (set by user from WordPress theme option panel).I am using the following code:\[code\]<?php if ( function_exists( 'get_option_tree') ) { $taxonomy = get_option_tree( 'taxonomy_option' ); } $args = array( 'project_type' => $taxonomy, 'show_count' => 6, ); query_posts($args); ?> \[/code\]The code is working just if I enter on \[code\]'project_type' => 'my taxonomy name'\[/code\]. What is wrong with the code above? How I can get an option (option-tree) into args array? Later edit: the optiontree function render the taxonomy ID.thanks