Can anybody help me?

Sorry my poor english first!

Now:
druapl 5.1
category 5.1
Tagadelic 5.x-1.x-dev

These has blog module,tag module. i used the category create the blog category.so i rewrite the php code for showing the blog category and the archive numbers.like:
# 3rd party apps (2)
# Development (2)

$category_name = 'Blog category';
    if (user_access('access content')) {
    $result = db_query(db_rewrite_sql("SELECT term_data.tid, term_data.name, COUNT(category_node.cid) AS count FROM {vocabulary} INNER JOIN  {term_data} USING (vid) INNER JOIN {node} USING (vid) LEFT JOIN {category_node} on category_node.cid=term_data.tid WHERE vocabulary.name='$category_name' AND node.status =1 GROUP BY term_data.tid, term_data.name ORDER BY term_data.name"));
    $items = array();
    while ($category = db_fetch_object($result)) {
      $items[] = l($category->name .' ('. $category->count .')', 'node/'. $category->tid);

    }

  return theme('item_list', $items);
  }

Administer>> Content management>>Content types>>blog entry
use the add field(type Taxonomy Field) add a field .when create the blog entry content, i can set the tag.
When i entered a new tag (it's not in the blog category.) it create a new category in taxonomy.

Now ,i need a block for tag cloud. i know the category module changed the default taxonomy. but the tagadelic use the taxonomy to show the tag cloud.What can i do?