The attorney represents the executor, not the beneficiaries. So the attorney can (and should) meet with the executor outside the presence of the beneficiaries. A new attorney can be hired to replace the old one, but the executor chooses which attorney to hire. The beneficiaries don't have authority to fire the estate's attorney. However, if the court has appointed you as a co-executor, I don't understand why the attorney would refuse to talk to you. You can certainly talk to and hire an attorney to represent only you and protect your interests as a beneficiary.