Did you submit a request to create a new Title page for your film? IMDb does not automatically create Title pages (unless you submitted the film to a film festival through WithoutABox). Almost all Titles are added by the production company or by users who have a lot of knowledge about them.
If you have not done so, you should submit a New Title request. The New Title submission requires a significant amount of data, so you are probably the person best placed to fill in the form.
I would recommend that you start by reading the Submission Guide: Adding a New Title. At the end of that Guide there is a text link to theĀ New Title Submission form.