Hi LindyMH,
Thank you for providing the error message. This error means that when a program such as AccountRight asks which version of Outlook is installed, the wrong version is being reported back, causing a communication problem and errors between the programs. To resolve this, please check out this post. There are three troubleshooting steps that you may follow in that article. The last one will require an IT specialist if the first two steps do not work.
Feel free to write a post if you need further assistance.
Cheers,
Jem