weird server problem

[amber438]

This has my admin stumped..maybe someone can shed some light on it..
I have 6 domains on a dedicated server..nothing is putting a heavy load on the server at all..one domain takes a VERY, VERY long time to load both from the root index.html and the inside index.shtml..pages are not exceptionally large, in fact the root index.html is almost the same exact page as another index.html on a different domain that loads like lightening..not using ssi or php invocations at all..
I have the server set to parse both php and ssi..when he makes it parse just php, this site in particular is fast as hell..when he makes the server parse both, this is the only slow site..
any ideas..?? would be a real help..

very weird..

thanks a bunch