help please?

Alright so I got the DDS Pro Basketball 2017 a couple years ago and only started playing it now. There is no forum for the 2017 version so I am posting here. At the end of season meeting my owner said that I could go 15 million over cap for the next season. In free agency I'm trying to sign a power forward but I'm at the salary cap. Ok so I can just go a bit over cap right? Wrong. Its not letting me go a cent over the cap. I checked around and half the league is like at least 20 million over cap. How can I fix this. Am I just not allowed? If so why are everyone else allowed?