When we take a shower, after several showers the floor in the closet which is behind the shower gets wet, haven't used the shower in a year, now it is getting hard for me to get out the tub. What can I do to fix this problem?

The very first thing we have to do is localize the leak. Let's check for a ruptured drain seal, Remove the strainer and close off the drain with some wet rags clumped together. Fill the base with a inch of water and let it set. Keep checking the floor fro moisture, If nothing in a few hours get back to me and we'll do another check, Good luck, Tom