Pages whiting out in admin cp

[Iguana Goddess]

When I click save in styles and templates the page whites out, it also does this if I try to run Repair/Optimize tables (but only if I check all).
So then I try to take a look at View php info and I get a white page with this error code

Warning: phpinfo() has been disabled for security reasons in [path]/admincp/index.php on line 1106

I don't know if this is a result from my server going down last night or if I have something installed wrong, I don't believe that I installed anything incorrectly as I haven't added anything in the past couple days.
In regards to my server being down last night even the hosting companies site had gone down too.

Any ideas as to what the problem is and how I can fix it?

--------------- Added [DATE]1281237497[/DATE] at [TIME]1281237497[/TIME] ---------------

I found out that hosting turn whatever off hence the error message but why is it affecting my site and causing pages in admin to white out?