Thanks for the responses.
I can wittle my problem down to frame boxes. For whatever reason, Access 2007 just takes a 1/10th of a second to fill an option button in a frame box on the click event, whereas in Access 2000, clicking on the option button fills it instantaneously. For my form, I am clearning labels and assigning a value to over 40 frame boxes on certain routines. I don't know why, but with '07 it then takes 4 seconds or so to do the job. I have two computers at my desk, one with Acc 2000 the other with Acc 2007. I bring up the same program and form and compare the click events on the same frame boxes. There is a very obvious lag in response time with the 2007 form, exact same form, exact same application, exact same code, different versions of Access. Don't know, will continue to look at it but doubt if there's any 'fix'. In the future will have to stay away from frame boxes and option groups as much as possible.
Thanks again for your responses.