Command button will not open form in a copied database

[Chuck]

I have a working database originally created in Access 2003 and which I am successfully using in Access by way of Office 365. The command butttons open forms. I copies this database and then pasted with a new name and find that the command buttons do not work. I am wondering whether the database that I have been using successfully in the current version of Access is in an older and retained file format and the copied database is in a newer format that does not allow for the form opening code.

Questions:

1) How can I detect the file format?

2) Does the simple act of copying a DB in an older file format and saving it with a new name have the effect of converting the DB into the current format?

2) The code to open the forms is:

Private Sub Command0_Click()
DoCmd.OpenForm "Deposits"


DoCmd.Maximize
End Sub

[Micron]

You copied the db into a folder that is not trusted?
Your issue won't have anything to do with Access versions as simply copying does not alter versions (or format, as you called it).

[Chuck]

Just noticed a bigger problem. First, none of the command buttons work and more significantly, data entered into any particular form does not get entered into its underlying table.

[Chuck]

CORRECTION! The issue is ONLY the command buttons not working. (Tables and forms associate properly.)