Fax in navision CRM

Dear All,

I tried to use fax in the interaction (segment) in nav crm function. When I log the interaction, the system generate the mail merge in word 2007. However, there is error message from word 2007.

something like "Microsoft Mail Local Fax is not installed on your system."

Is it hopeless to use fax function in NAV 5.0?

I am using vista business, word 2007, NAV5.0 with database 5.0sp1.

thanks in advance.

Rich