I have an iPad 3rd generation and I get that message as well so it has nothing to do with having an iPad 2. The message means exact,y what it says, there was a problem loading the web site. In some situations, it just might be a problem with the website itself. Please note that I said in "some" situations. If you are getting this message every single time that you try to load a page, something is wrong.
Did you clear Safari, close all apps and then reset the iPad? Settings>Safari>Clear history and website data.
Now close all apps. In order to close apps, you have to drag the app up from the multitasking display. Double tap the home button and you will see apps lined up going left to right across the screen. Swipe to get to the app that you want to close and then swipe "up" on the app preview thumbnail to close it.
Next, reset the iPad by holding down on the sleep and home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider if it appears on the screen - let go of the buttons. Let the iPad start up.