Link blog fatal error

[gigicop]

Hi everyone!
I'm having some problems with CMSMS on 2 web sites where I'm testing it, and I hope you can help me.
When adding a link to the link blog I receive the following message:

***
Fatal error: Call to undefined function: cms_mapi_redirect_user_by_pageid() in /home/spazioin/public_html/cms/modules/LinkBlog/LinkBlog.module.php on line
747

***

What does this mean? What should I do to avoid this message?
This seems to be the only problem because the link I type in is usually added to the list.
Thanks in advance.

Gigi