This seems like it would be easy to do but I can't figure it out...

I have a login form where the user selects his/her User ID and enters a
password.  The user then selects a command button to sign in.  The command
button runs through some code which checks the password and then closes the
Sign In form and opens another form if the password is correct.  What I want
to do is have the command button code run when the user hits the ENTER key on
his/her keyboard (this would provide the user with two options for logging
into the database: select the Sign In command button, or simply press ENTER
on the keyboard).

The problem is that I can't seem to accomplish this seemingly easy task
without triggering the 2585 run-time error.  What I've done is called the
code from the ENTER event of the next tab control. Apparently Access doesn't
like the fact that I'm trying to close a form on the "ENTER" event of this
control.

Any suggestions for how to circumvent this error?  Is there a better way to
do this?

Thanks,
Manuel