Contact Management and Task Management have their own separate contacts tables. Entering contact data in one file does not automatically make it accessible to the other.
To make that work requires quite a bit of redesigning the two solutions in order to share the same contacts table and get it to work with all scripts, layouts, etc. in both files. That's a task that will a significant challenge for a "newbie".
PhilModJunk, thanks for the very quick reply. I'll stop fiddling around with it until I am more competent!!
Please note that I am not telling you that you can't or shouldn't do it, just be prepared to take on a pretty major overhaul to get this to happen. You may, on the other hand be able to find other templates from third party sources that already combine these functions for you.