Save button don't show up inside reseller options

Hi guys, i have some strange problem,

Inside Reseller options the save button just disappeared after saving enom as option.

There is nothing here inside and this is the end of the code in admin panel. WP admin footer is also not generated
</ul><div id="reseller-c869eed" class="domainmapping-reseller-settings active">

Php error log gives me this error here.

Wed Oct 16 17:23:04 2013] [error] [xxxxxx] PHP Fatal error: Call to a member function get_setting() on a non-object in /httpdocs/wp-content/plugins/domain-mapping/classes/Domainmap/Reseller/Enom.php on line 257, referer: /network/settings.php?page=domainmapping_options&tab=reseller-options
[Wed Oct 16 17:23:06 2013] [error] [xxxxx] PHP Fatal error: Call to a member function get_setting() on a non-object in /httpdocs/wp-content/plugins/domain-mapping/classes/Domainmap/Reseller/Enom.php on line 257, referer: /network/settings.php?page=domainmapping_options&tab=reseller-options

We have tried to disable all plugins and have only domain mapping enabled but still does not work

Best regards
Smari