More than likely the email that you got stating the domain name was about to expire also contains instructions on how to go about renewing it.
It doesn't appear that domain name was registered through us, so you'll want to contact the Registrar who registered the domain name for you to inquire about getting it renewed successfully. You can find information about your domain such as the Registrar by following the steps in our guide on how to look up a domain's whois information.
According to the whois record for the domain, it does look like it's set to expire yesterday 3/25/2013, so you'd want to get that taken care of as soon as possible to ensure the domain doesn't go into redemption which can be more expensive to renew it from.
Hope that information is helpful, please let us know if you had any further questions.
can i register through you now that it is expiring
Thank you for your question. In order to register this domain with us, you will have to wait for your old registrar to release it. That means there is a chance someone else might register it before you.