integrating NAV-CRM using Microsoft Dynamics NAV connector

Hi,
I am integrating NAV-CRM and using NAV 2009 R2, CRM 2011. We are using Microsoft Dynamics NAV connector for integrating NAV and CRM. We need to map the fields of Quote in CRM to Sales Quote in NAV. We have used the following fields in sales header and sales line,

SALES QUOTE HEADER BASE NAV

Sell-to Customer No ----> Sell-to Customer No.
Bill-to Customer No ----> Bill-to Customer No.
Payment Terms Code----> Payment Terms Code
Order Date ----> Order Date
Posting Description ----> Posting Description
Salesperson Code ----> Salesperson Code
Ship-to Name ----> Ship-to Name
Requested Delivery Date ----> Requested Delivery Date
Ship-to County ----> Ship-to County
Ship-to City ----> Ship-to City
Ship-to Address2 ----> Ship-to Address 2
Ship-to Address ----> Ship-to Address
Assigned User ID ----> Assigned User ID

SALES QUOTE LINE

Document Type ----> Document Type
Document No ----> Document No.
No ----> No.
Type ----> Type
Quantity ----> Quantity
Amount Including VAT ----> Amount Including VAT
Requested Delivery Date ----> Requested Delivery Date

We get error stating that “LineIntegrationID” cannot be null. Please suggest us whether the mapping is done to appropriate fields and share your experience for mapping the Quote(CRM) and Sales Quote(NAV)