Without looking at your HTML it is difficult to tell exactly what may be happening. Based on your description it could be that your input command is missing some information. For instance, it should look like this:
<input type="submit" value="Continue">
and, following the input command, it could be that your <form> command is not closed with </form>
Are either or both of those in need of editing?
If not and you still need help with this issue, upload your HTML.