All forums readonly but I can't see why

Hi,
I'm running 5.2.18 (yes, I know it's old, I'm on my way out running the site it's on, [www.lancasterbirdwatching.org.uk]).

Just today, it's saying "This forum is currently read only. You can not log in or make any changes. This is a temporary situation."
I can see that this is setup in common.php when the variable $PHORUM["status"] is set to PHORUM_MASTER_STATUS_READ_ONLY, but I can't see anywhere in the code that this variable is set (can only see it being read). I also can't see anywhere obvious in my forum settings where it looks disabled.

Can anybody suggest why this might be happening? I can still log in to the admin.

Andrew

Go to the admin

In the upper right corner after logging in is a drop down selector. It may have been changed accidentally to "Read Only"

Oh my goodness! Thanks so much! I completely missed that. I've given access to somebody else recently, they must have done that for some reason. All fixed now.