Internet Security 2010 - Slow program run from shared drive

Since installing NIS 2010 the main database program I use runs very slowly. It is server from a shared drive on an Win 7 machine and is run on 2 client pc's Vista / XP sp3. It seems as if NIS 2010 is scanning every read write on the shared drive. Is there any way of reducing the real time scans without compromising security?

Thanks