Appointments+ settings -> add a service

Just purchased the month full membership but have an issue with appointments plus.
In settings -> add service, your plug in message says: Here you should define your services for which your client will be making appointments. There must be at least one service defined. Capacity is the number of customers that can take the service at the same time. Enter 0 for no specific limit (Limited to number of service providers, or to 1 if no service provider is defined for that service). Price is only required if you request payment to accept appointments. You can define a description page for the service you are providing. When I click the link nothing happens.... therefore I cannot add a "NEW SERVICE" Please advise.