Hi, ACC263625 and lewisdoug
It seems that you are having some issues in order to get the connection through the iPhone Mobile application, since it does not recognize the password.
Most of the times, this issue is related to a confusion with the passwords in use. Remember that there are two passwords: one for the Sling Accounts and other for the Slingbox. With this in mind, I recommend you to verify if you are using the same password on your computer and the Mobile application for the iPhone. If it does not work, go to Sling Accounts and reset the password.
Changing the password for your Sling Account
If the issue persists, you will need to reset the Slingbox in order to create a new password.