I understand that you are having some issues when connecting to your Slingbox PRO because it keeps asking for the admin password.
Most of the times, this issue is related to any security software running on your computer. As an option, we recommend you to test the connection to your Slingbox using a different computer. Besides, we also recommend you to check if your computer meets the requirements for your Slingbox (as minimum requirements). Make sure to check the following link in order to get further details.