I think you're having a memory problem. I was having that a couple of weeks ago.
Here's what Raz told me to do..
"Dim, the problem may be with your cache. If you're using MSIE then do the following to always get a fresh page:
Tools->Internet Options->Settings->
Set "Check for newer versions of stored pages" to "Every visit to the page".
I'm going to move this to Suggestions.