Well this is just strange.

We have sucessfully setup a DNN portal in a subfolder on our site (www.advent1.com) and even have flash content and custom skins on it.
But after about 12 to 24hrs the entire site (not just the DNN portal but this started after we installed DNN) goes down with this error:

"SERVER APPLICATION UNAVALIABLE"

This has been happing for almost a month now and sometimes it comes back up and stays on for an hour or two but then goes back down (It is currently down).  We're pretty sure the whole site goes down because we're using .aspx as our default file extension, even though most pages don't have active content.

We have had to call our host (Atlantic.net) numerous times to have them reset IIS.
When we asked them what the problem is they are saying "The Application Pool is filling up to its max and stopping all events from happing and that it could be that our code is not closing the database connection properly."

We've tried changing cache settings from "moderate" to "light" and "none" 

Please Help!

DNN 4.5.5
ASP.Net 2.0
SQL 2000