Connector CRM to NAV: NAV Sales Order to Order: The entity cannot be locked because it is read-only

Hi all, 

i have a strange thing in our CRM Online / NAV - Connector.

The Mapping: NAV Sales Order to Order creates errors like this:

- The entity cannot be locked because it is read-only.

- Generic SQL error.

I cant find any hint to solve this problems. i played arround with the mapping, but i am sure, i made everything undone, but the errors above will not let me sync any nav order to crm.

Does anyone have a solution for this?

many thx, Greets
peb