Problems to match fields in Bitrix

Hey there,

i just installed this Plugin, so far it works okay. But i have some additional fields where my customers can fill out informations i need. I can’t map these fields in Bitrix, because in the dropdown list they never show up. I added the fields in the CRM section.
So i thought okay, i map them all to the field comment, but then only the last value from my form is shown there. How to add my custom form-fields to fill bitrix?