It sounds like it isn't entering data, but viewing your records only. If this is the case, I seem to recall that you will need to change the properties of the form in design view. This was certainly an issue I had.
Go to 'Edit' - Select Form
Then 'View' - Properties.
On the window that pops up, under the data tab, ensure you have 'Allow Additions' and 'Data Entry' set to yes.