Windows 7: Need Help with WpWin Error

Hi,

I just installed WordPerfect 8 (older version) on my new Windows 7 Home Premium PC. It installed fine, I was able to set my defaults, type new documents and everything seemed fine until I tried to save a new document. When I click "Save", a window opens saying "WPWin Error, Cannot Save File". My old pc was an XP and of all of my software programs, WP8 is the only one I've been able to install with no problems. I've had to purchase other new software just for Win 7. I really would like to avoid having to buy new WordPerfect software as well. I did download WinHlp32.exe so I could use the help files. Otherwise, can someone tell me what is causing this WPWin error and how to save my new documents? Thank you.