Hello!
Unfortunately your only option is to reset the phone (which means losing all data on it), if you cannot remember the password. Be advised if the device has reset protection on it, you will be required to login to your Microsoft Account upon completing the reset in order to access the phone.
Also, in order to reply to our posts, please consider making a Mobile Nations account! It's free, it works across all our Mobile Nations sites (including CrackBerry, iMore, Android Central, and others!), and is your Passport to engaging with the various communities here at Mobile Nations!