Issues with terminated domains

I purchased a website name currently for my site. But I’m having some troubles regarding this. I bought it thus on aim precise keywords. But I came to understand that my web site has crossed its termination edge because it was registered few years back. I used the rear machine method to capture a look on my former substance and it's found that this domain name wasn't used unlawfully or illogically. I used to be stress-free though the domain name isn't nonetheless registered even once making an attempt for the last three weeks. What’s the explanation once it? Did anybody ever face similar problem?