Controls not in Object box dropdown

[RBesdansky]

I created a form with controls, and attached code to some of the controls.
After using the form for a time, when I go to the code module, none of the
controls appears in the object box dropdown. The list only includes "Form",
"Detail","Form Header","Form Footer". All the code is still there, but it is
all listed under "(General)". The "On event" properties for the controls are
set to "[Event Procedure] and clicking on the 3 dots takes me to the correct
code, but the code doesn't execute.

I fixed it by re-creating the form, but I can't keep doing that forever.
ANybody know what might wrong? It's Access 2003 SP2 under XP Professional.

Thanks