PHP Erlang Bridge # ei_connect error

Question

I installed the mypeb php apache erlang and more. mypeb is here : http://code.google.com/p/mypeb/

I need to connect Erlang node and call it.

then my php code is :

$link = peb_connect('[email protected]',  'abc');
if (!$link) {
    die('Could not connect: ' . peb_error());
}

[email protected] is my Erlang node

but also notice Could not connect: ei_connect error

help so ,thanks.