my proxy server wont start

[main sun]

I have 1 proxy server and 2 normal servers connected to it
buy when i try to start it it says
"You have reached your server limit. Purchase server slots to increase it"
and now i dont know what to do

[fiery storm]

you can only activate 2 servers at a time you need to purchase server slots to be able to activate more

[main sun]

oh

okay