This is a common issue executives that have either not looked for a new career opportunity in many years, or have never worked with an Executive Recruiter.
First, keep the Executive Recruiter informed of all communications and interviews with the hiring company. They are your Talent Agent.
Second, provide feedback to the Recruiter after each interview. Specifically, do you still have interest in the job? It's disappointing when I email a client to find out when a candidate will interview, only to find out they already did. Where's my feedback from the candidate? Far too often candidates push on me to make the interview process move more quickly, but don't keep me in the loop.
Remember this, I don't get paid unless I get you placed, so rest assured I'm on the job.