[Plugin: Web Invoice – Invoicing and billing for WordPress] Web Invoice Insufficient Permissions to

I installed Web Invoice yesterday and set up everything I needed to. Tonight I logged into my blog and wanted to look at Web Invoice’s settings. I didn’t see it listed in my Dashboard. I navigated to the Plugins section and clicked the link in the Web Invoice listing for the settings page.

I receive this error “You do not have sufficient permissions to access this page.” when it tries to access http://wargamingforums.com/wp-admin/admin.php?page=web_invoice_settings

I did not change anything from last night. I am using my administrator account. Any ideas?

I have already tried deactivating and then reactivating the plugin. That did not work. I have not deleted the plugin because I don’t want to lose my settings in it (plus I have an invoice saved). But, I will delete it if I have to.