WITHOUT A DOUBT, Rhoda Klitsner has her hands full. She's directing Diablo Light Opera Company's "Me and My Girl," and is already holding rehearsals for the show opening Jan. 28 at the Dean Lesher Regional Center for the Arts.

But that's not all. She also has the challenge of directing DLOC's "Nostalgia Concert," a celebration of the company's 40th anniversary, which will have two performances Nov. 21 at 2:30 and 6:30 p.m at the Regional Center. Refreshments will be served between the two shows so that patrons have a chance to see old and new friends.

"My concept for this show is to have a reunion of our present and past performers and supporting members to celebrate our 40 years and their contributions to our phenomenal success. I have picked numbers from our history, based on using those who originally played the roles, and I've tried not to exclude anyone arbitrarily," says Klitsner, who has directed and/or choreographed 42 of the company's 79 productions.

"I've also tried to include some of our landmark productions, such as the Gilbert and Sullivan of our original roots; 'The Sound of Music,' which opened the old Civic Arts Theatre; 'Fiddler on the Roof,' which made it possible for us to buy the Firehouse; 'Annie', which paid off half the Firehouse; 'La Cage aux Folles' and 'Die Fledermaus,' because they were our first productions in the Regional Center. I also want to show our versatility by doing the gamut from G&S to tap-dance shows, operettas, Sondheim, Lloyd Webber and, of course, something from the youngsters in our Stars 2000."

And that's only the beginning. Another treat in the program will be a preview of "Me and My Girl," which was first produced in 1991. For tickets, which are selling fast, at $20 for DLOC members and $30 general, call 925-943-SHOW.