Thank you for using our answers forum! I'm sorry to hear you are having problems connecting to your Slingbox. I believe, the reason you cannot get a solid connection to your Slingbox is because you are using a universal power supply. In most cases, the Slingbox will not function properly if it is not using a power adapter made for that unit. Since you said you have the red model, that would be the Slingbox PRO. With that being said, you can go to Slingbox.com and purchase a power supply for the Slingbox PRO for $19.99, including free ground shipping. This is located under Buy Now at Slingbox.com, in the Replacement Parts section. Here is a link to help you get there.
Hope this helps!
The Sling Moderation Team