Multi-table Form Problem

I'm creating a database that contains some information spread out over multiple tables. In order to enter information into the database there are a couple forms that the user can access to enter all the information, and these data will be placed in the appropriate tables. I am also creating a form that will be used for data-viewing and simple editting purposes. This form will contain data from many different tables and viewed all together in the same form.

I created this second, more complicated form (more complicated because it contains more tables all viewed on the same form) and editting and adding new data doesn't work. It won't let me type in the fields. I've narrowed down the problem to the combination of three tables and I will explain the nature of the relationships of these tables.

First of all, I have a table the contains general person information. These needed to be broken down in to sub-groups, employee and contract. Each of these two sub-groups of people has their own specific fields that need to be entered, so I created three tables. The first table, person, has general person fields. The other two tables, employee and contract, contain fields that are specific to their person type and a foriegn key referencing the associated person information.

My problem is that, on the more complicated form, I wanted to put all the fields related to that entry. So a contract person would have all the fields filled in for the general person, the fields for contract person would be filled in, and then the fields for employee would be blank. Now, I'm sure there is a better way to do this (for example gray out the employee fields when a contract person is viewed, or hide fields for employee etc.) but I'm new at VB and that seemed more complicated.

If anyone has any ideas on what the problem might, or how I could resolve this, that would be amazing. Thanks in advance