Buy-in range question

I usually play "Amsterdam Sq… it shows buy-in range: 1000-4000, but when I get to a table it only allows me a buy-in of 2500. how can I change the?

Here’s what I find on the Ring tables:
If you click the Play Now button, the computer loads the mid range amount, e.g., 2500.
If you click the Open Table button, you will get either a Seat Available or Join Waiting List button. In either case, when you click one of these, you can designate the amount you want to start with from the full range.
Hope this helps! Good luck and Good poker!