98 Honda Accord automatic gear shift gets locked in park. What is the problem?

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My 98 4 cylinder Honda Accord automatic gear shift has started getting locked in park position. My break lights are working. My breaks have started screeching off and on when I apply them. Sometimes I can unlock gear shift by pressing hard on breaks, and sometimes this does not work. Do you have any idea what is going on? Is this a common problem that Honda will fix at no charge?