Two weeks have gone by and we still get max_connections and timeout errors. Only have 20 or 25 users at any one time. The host increased connections and file size (for cache). And reduced timeout settings.

Yesterday they restarted IIS to get up back.. but 20 minutes later we were bogged down again.

Are you sure that there isn't any issue with 7.5.4 not closing out processes? Sorry, I had to ask.