First of all, thanks for being on Mechanics.SE to ask and answer questions. We appreciate you being here.
People are going to downvote as they see fit. There is no rules or
regulations which say they have to post as to why they downvoted any given post, so you unfortunately cannot expect one.
Just from reading your post, let me see if I can decipher some reasons which may help you going forward.
- First of all, ensure you've read How to ask a good question in the Help Center.
- Next, with the question itself, you really didn't provide a lot of information. You didn't mention how you got the old one out.
- Was it broken?
- Was there issues where you couldn't just put the new one in place?
- Was there just not something there which you were trying to replace?
- You also didn't mention what you've tried to do with the new one to get it to stay. Tell us anything here which might help.
- Pictures are worth a million words. With the advent of digital photography and a smart phone, it's really easy to get something reasonable which may help us to help answer your question.
Like I said, there's nothing which can be done about a downvote. It is completely within a user's right to downvote if they feel so inclined and they have the privilege to do so. Unless the people who downvoted you come on this question and specifically tell you, this is probably the best information you'll likely hear about it.
I hope this doesn't discourage you from asking/answering questions. I sometimes get downvoted as well, most of the time without a comment. It's just one of those things.