This means you aren't high in the 'programming interview' skill set. While related, I consider it distinctly different than the 'programming' skill set. I think it shares more in common with other interview skill sets than it does with programming. I suggest not using this to judge your proficiency in programming, and if you want to improve this (say you plan to be job hunting soon), I would focus more on interviewing skills than programming skills. Especially if you aren't landing on-site interviews.
For starters, improving your resume to have a good UX and working on how to answer interview questions, especially the non-technical ones, would likely help. Things like how to 'correctly' answer "What is your biggest weakness?" or "Why are you looking for a job?". A lot of it comes down to learning how to lie without appearing dishonest (personally I hate how much honesty during interviews is treated as a bad thing, but I have to play the game by the rules that already exist).