I cant replace to lid back on my timex watch properly.its a women's watch.stainless steel back.is there anything that im supposed to do to click it into place properly?

I had the same problem and tried everything. Here was my solution. Use a double-sided 2" rubber mallet. (Below is a photo of a similiar mallet.) Be sure to use caution while pressing with force. There is always the danger of cracking the crystal, however, my solution worked perfectly for me. I hope it does for you, too. Keep in mind that some watch backs screw on with a special tool, but if you snapped yours off, it should snap back on.
Start by lying the watch, crystal side down, on a vinyl padded notebook. Also make sure you have it aligned properly with the stem.

1. Place one of the rubber mallet heads over the watch back.
2. With all your force, push down on the other end of the mallet's head.
3. Voila, you should hear a slight pop and the back will again be secure on the watch.