Notice: Undefined index: sms_simplegateway_...

When clicking on "SMS Framework" --> "Simple Gateway" --> "Configure" I experience a problem. Could anyone take care of it, please? I really need the module doing its job...

Notice: Undefined index: sms_simplegateway_base_url in sms_simplegateway_admin_form() (line 57 of /Users/testsite1/Sites/devdesktop/acquia-drupal-7.39.45.6271/sites/all/modules/sms_simplegateway/sms_simplegateway.module).
Notice: Undefined index: sms_simplegateway_method in sms_simplegateway_admin_form() (line 62 of /Users/testsite1/Sites/devdesktop/acquia-drupal-7.39.45.6271/sites/all/modules/sms_simplegateway/sms_simplegateway.module).
Notice: Undefined index: sms_simplegateway_user_field in sms_simplegateway_admin_form() (line 74 of /Users/testsite1/Sites/devdesktop/acquia-drupal-7.39.45.6271/sites/all/modules/sms_simplegateway/sms_simplegateway.module).
Notice: Undefined index: sms_simplegateway_user_value in sms_simplegateway_admin_form() (line 82 of /Users/testsite1/Sites/devdesktop/acquia-drupal-7.39.45.6271/sites/all/modules/sms_simplegateway/sms_simplegateway.module).
Notice: Undefined index: sms_simplegateway_pass_field in sms_simplegateway_admin_form() (line 90 of /Users/testsite1/Sites/devdesktop/acquia-drupal-7.39.45.6271/sites/all/modules/sms_simplegateway/sms_simplegateway.module).
Notice: Undefined index: sms_simplegateway_pass_value in sms_simplegateway_admin_form() (line 98 of /Users/testsite1/Sites/devdesktop/acquia-drupal-7.39.45.6271/sites/all/modules/sms_simplegateway/sms_simplegateway.module).
Notice: Undefined index: sms_simplegateway_sender_field in sms_simplegateway_admin_form() (line 106 of /Users/testsite1/Sites/devdesktop/acquia-drupal-7.39.45.6271/sites/all/modules/sms_simplegateway/sms_simplegateway.module).
Notice: Undefined index: sms_simplegateway_number_field in sms_simplegateway_admin_form() (line 114 of /Users/testsite1/Sites/devdesktop/acquia-drupal-7.39.45.6271/sites/all/modules/sms_simplegateway/sms_simplegateway.module).
Notice: Undefined index: sms_simplegateway_message_field in sms_simplegateway_admin_form() (line 122 of /Users/testsite1/Sites/devdesktop/acquia-drupal-7.39.45.6271/sites/all/modules/sms_simplegateway/sms_simplegateway.module).
Notice: Undefined index: sms_simplegateway_recv_number_field in sms_simplegateway_admin_form() (line 141 of /Users/testsite1/Sites/devdesktop/acquia-drupal-7.39.45.6271/sites/all/modules/sms_simplegateway/sms_simplegateway.module).
Notice: Undefined index: sms_simplegateway_recv_gwnumber_field in sms_simplegateway_admin_form() (line 149 of /Users/testsite1/Sites/devdesktop/acquia-drupal-7.39.45.6271/sites/all/modules/sms_simplegateway/sms_simplegateway.module).
Notice: Undefined index: sms_simplegateway_recv_message_field in sms_simplegateway_admin_form() (line 157 of /Users/testsite1/Sites/devdesktop/acquia-drupal-7.39.45.6271/sites/all/modules/sms_simplegateway/sms_simplegateway.module).