Warnings when activating profile enforcer block

I get these warnings when trying to activate the block:

warning: Missing argument 2 for variable_get(), called in F:\www\drupal5\sites\all\modules\profile_enforcer\profile_enforcer.module on line 112 and defined in F:\www\drupal5\includes\bootstrap.inc on line 369.
warning: Missing argument 2 for variable_get(), called in F:\www\drupal5\sites\all\modules\profile_enforcer\profile_enforcer.module on line 117 and defined in F:\www\drupal5\includes\bootstrap.inc on line 369.
warning: Missing argument 2 for variable_get(), called in F:\www\drupal5\sites\all\modules\profile_enforcer\profile_enforcer.module on line 124 and defined in F:\www\drupal5\includes\bootstrap.inc on line 369.
warning: Missing argument 2 for variable_get(), called in F:\www\drupal5\sites\all\modules\profile_enforcer\profile_enforcer.module on line 135 and defined in F:\www\drupal5\includes\bootstrap.inc on line 369.
warning: Missing argument 2 for variable_get(), called in F:\www\drupal5\sites\all\modules\profile_enforcer\profile_enforcer.module on line 138 and defined in F:\www\drupal5\includes\bootstrap.inc on line 369.
warning: Missing argument 2 for variable_get(), called in F:\www\drupal5\sites\all\modules\profile_enforcer\profile_enforcer.module on line 144 and defined in F:\www\drupal5\includes\bootstrap.inc on line 369.
warning: Missing argument 2 for variable_get(), called in F:\www\drupal5\sites\all\modules\profile_enforcer\profile_enforcer.module on line 165 and defined in F:\www\drupal5\includes\bootstrap.inc on line 369.