2 things you need to do;
>> So I added this field (CON:ContractHours) on the webform.
Usually you don't add the remote form field (as a field), because it's not really a form field. However I suppose it's ok, (although the next step then looks a bit wierd.)
1) In the "More Assignments" setting for the Lookup field set
CON:ContractHours = CON:ContractHours
2) In the Client Side tab for the lookup field, on the Reset Fields list, add
the CON:ContractHours field.
cheers
Bruce