Wordpress Custom Search by post_type

[admin]

I've tried a couple of methods but I cannot seem to filter custom

post_types

from my search results and was hoping someone could help.

I have installed "Job Manager" and created 4 jobs which have a custom

post_type = 'jobman_job'

I tried to create a manual search form and set a hidden value of

post_type = jobman_job

but it still returned all posts.

<form role="search" method="get" id="searchform" action="<?php echo home_url( '/' ); ?>">
<input type="text" name="s" id="s" value=""/>
<input type="hidden" name="post_type" value="jobman_job" />
<input type="submit" id="searchsubmit" value="Search" />
</form>

I then tried creating a custom search page and redirecting the search to this page as follows (i.e added

page_id

hidden field):

<form role="search" method="get" id="searchform" action="<?php echo home_url( '/' ); ?>">
<input type="text" name="s" id="s" value=""/>
<input type="hidden" name="page_id" value="123" />
<input type="hidden" name="post_type" value="jobman_job" />
<input type="submit" id="searchsubmit" value="Search" />
</form>

And then in the custom search page, I added the following code (as per wordpress guide - <a href="http://codex.wordpress.org/Creating_a_Search_Page" rel="nofollow">http://codex.wordpress.org/Creating_a_Search_Page</a>) and I added the

post_type

of

jobman_job

to the query array:

global $query_string;

$query_args = explode("&", $query_string);
$search_query = array('post_type' => 'jobman_job');

foreach($query_args as $key => $string) {
    $query_split = explode("=", $string);
    $search_query[$query_split[0]] = urldecode($query_split[1]);
} // foreach

$search = new WP_Query($search_query);

And it still displays all posts...

What am I doing wrong? I have checked the

post_type

column in the

wp_posts

table and I have 4 unique entries...so they are there...

Any Insight?