If it is happening to many members in different locations, it could be a problem at your data center where your board is physically located. I've had a couple of different issues in the past. First was when I was on a VPS. In that case I was sharing a server with many other web sites, and if one of those sites was bogging down the server, it affected mine. I eventually went to a dedicated server (leased) for that very reason. But even with the dedicated server, there have been times when a router box at the data center had problems and caused slow load times.
