URGENT Help on job advice...please?

ok i have a Summer job already, but since the economic business is going on i decided to apply for jobs for september now. i called on job placement and asked if they were any jobs, and they said that they are asking people to hand in there CV and when something comes up they will give me a call, i handed my CV in as the job was needed for september and they gave me a call a few hours later for a interview...i haven't had the interview yet but i don't know how to tell them if i get accepted that i can not work until september. please help



p.s. no advertising for other jobs!

If you don't tell them you're likely to wind up with a huge scheduling problem.
You need to make it clear that you've committed to a summer job and aren't available until September.

Why not find out what the opportunity is? It may be a better one than what you have now, and you can always move if you wish.

Alternatively, you can say that you have found a job on your own, and you have to pass on the interview, but to keep your CV ready for opportunities in September.