Dex customization

I had saved dynamics.dic prevously where i had done customizations in dex.

Now i want to acess the dynamics.dic and resume my development.

when i point to that dynamics.dic from dex enviroment to access my forms,i click on debug menu and then test mode

i get message

"you need to run dynamics.dic utilities before you can run dynamics.c.Do you want to launch Dynamics.dic utilities now? '

and the dex enviroment terminates.

what will i do to be able to access debug mode without the error notification.

Please help.