G2, php-nuke, GR not working

i am getting the typical "Gallery not found at this URL" error. unfortunately, nothing seems to fix it.

i can access my gallery using GR in standalone mode:
http://www.kh-tech.com/modules/gallery2

i get the error when i try to use GR in embed mode:
PHPNuke Login URL = http://www.kh-tech.com/modules.php?name=Your_Account&op=login&username=$USERNAME$&user_password=$PASSWORD$
Gallery Module URL = http://www.kh-tech.com/modules.php?name=gallery2

i tried to search for "Gallery not found at this URL" and Search for all terms, but nothing came up.

i am using:
GR = 1.4.2-b21
G2 = beta 4
phpNuke = 7.6