Invisible text in Pages/iWork '08 on OS 10.8 Mountain Lion...

Hi. I installed iWork '08 with Pages, Numbers and Keynote on my newest Mac running Mountain Lion. I entered my serial number and the installation completed.

My problem is none of the applications are working properly: they all load and open but once opened they do not allow any noticeable input...

In Pages it appears like the text I type is not being inputted in the document at all, but when I highlight the page with the mouse I can see the text revealed. So the text is all white, or rather, invisible. I did not change the text colour or anything - it is set at default black. This problem happens both when creating a new document and also when opening an old one - all the text is invisible/hidden unless highlighted with the mouse. And when I try to change the highlighted text from black to red it still stays white/invisible.

How can I fix this?