imp 2.3.7 cvs error

[aocastanheira@cariocaengenharia.com.br]

Hi,
When I click on an Ms word attached file I receive the following error :

Fatal error: Call to a member function on a non-object 
in /home/httpd/html/2.3.7/horde/imp/view.php on line 89

Any ideas ???

Thanks,
André