Cindy, if your partner is a good player then I think more time playing together might be the simple "cure". This is assuming of course you haven't already been playing together for a long time
Working out these communication issues takes a little time. It's why teams who have played together for years often have an advantage - they've come to learn what their partner can and can't get, they know what their partner means when she says "got it", and they can read each other's body language and know when the other might be in trouble and need some help.
You can talk some things out and that will help a bit, but I'm not sure there's any substitute for time on court together.