Can't add new field to form without getting error when entering re

[JohnG768]

Greetings,

I'm using the Classroom Management Database template found here:
http://office.microsoft.com/en-us/templates/TC010184071033.aspx?CategoryID=CT101426031033

On the "Classes" Form, I deleted the "Section No" field. Later I decided to
add it back in which was no problem, but now when I enter in new students in
the subform I receive the following error:

"The LinkMasterFields property setting has produced this error: 'A problem
occurred while Microsoft Office Access was communicating with the OLE server
or ActiveX Control"

While I can find my way around Access somewhat, I have no idea where to even
begin looking to solve this problem.

Any help would be greatly appreciated.

Thanks,
JohnG768