Problem command buttons not working

[A E]

database was created in Access 2003 and our computer was upgraded to Access
2007, it open database in Access 2007 and all working fine, then suddenly
command buttons stop working. Any idea how to solve this?

 

[Magius96]

In design view open the properties window for the command button. On the
Event tab, ensure that the On Click field has [Event Procedure] in it. Then
click in the field where you see [Event Procedure] and click on the [...]
button to the right. This will open the code editing window. Make sure that
it opened it to the correct function.

If on the other hand clicking on the [...] creates an empty function, you'll
have to copy & paste the code from the correct function into the one that was
newly created.