Undefined index: properties sites\all\modules\calendar_systems\calendar_systems_date_properties

Hi
Thank you a lot for this module.
I Installed it on my drupal 7 and I did everything in ReadMe.txt also but still I see following message.
Why it's happening??

• Notice: Undefined index: properties in _calendar_systems_date_properties_entity_types() (line 200 of C:\Users\ mypc\Desktop\websites\ sites\all\modules\calendar_systems\calendar_systems_date_properties\calendar_systems_date_properties.module).
• Notice: Undefined index: properties in _calendar_systems_date_properties_entity_types() (line 200 of C:\Users\ mypc\Desktop\websites\ sites\all\modules\calendar_systems\calendar_systems_date_properties\calendar_systems_date_properties.module).
• Notice: Undefined index: properties in _calendar_systems_date_properties_entity_types() (line 200 of C:\Users\ mypc\Desktop\websites\ sites\all\modules\calendar_systems\calendar_systems_date_properties\calendar_systems_date_properties.module).
• Notice: Undefined index: properties in calendar_systems_date_properties_settings_form() (line 79 of C:\Users\ mypc\Desktop\websites\ sites\all\modules\calendar_systems\calendar_systems_date_properties\calendar_systems_date_properties.admin.inc).
• Warning: Invalid argument supplied for foreach() in calendar_systems_date_properties_settings_form() (line 79 of C:\Users\ mypc\Desktop\websites\ sites\all\modules\calendar_systems\calendar_systems_date_properties\calendar_systems_date_properties.admin.inc).
• Notice: Undefined index: properties in calendar_systems_date_properties_settings_form() (line 79 of C:\Users\ mypc\Desktop\websites\ sites\all\modules\calendar_systems\calendar_systems_date_properties\calendar_systems_date_properties.admin.inc).
• Warning: Invalid argument supplied for foreach() in calendar_systems_date_properties_settings_form() (line 79 of C:\Users\ mypc\Desktop\websites\ sites\all\modules\calendar_systems\calendar_systems_date_properties\calendar_systems_date_properties.admin.inc).
• Notice: Undefined index: properties in calendar_systems_date_properties_settings_form() (line 79 of C:\Users\ mypc\Desktop\websites\ sites\all\modules\calendar_systems\calendar_systems_date_properties\calendar_systems_date_properties.admin.inc).
• Warning: Invalid argument supplied for foreach() in calendar_systems_date_properties_settings_form() (line 79 of C:\Users\ mypc\Desktop\websites\ sites\all\modules\calendar_systems\calendar_systems_date_properties\calendar_systems_date_properties.admin.inc).
• Notice: Undefined index: properties in calendar_systems_date_properties_settings_form() (line 79 of C:\Users\ mypc\Desktop\websites\ sites\all\modules\calendar_systems\calendar_systems_date_properties\calendar_systems_date_properties.admin.inc).
• Warning: Invalid argument supplied for foreach() in calendar_systems_date_properties_settings_form() (line 79 of C:\Users\ mypc\Desktop\websites\ sites\all\modules\calendar_systems\calendar_systems_date_properties\calendar_systems_date_properties.admin.inc).