CF_Pro,
After doing a full sync does the problem still happen?
Does the following simple C# example work for you?
string[ arrInsertFieldsArray = new string[ { "Name", "Contact" };
string[ arrInsertValueArray = new string[ { "SomeCustomer", "SomeContact" };
MethodAPI.Service _MethodAPI = new MethodAPI.Service();
lblMethodAPIInsertV2.Text = _MethodAPI.MethodAPIInsertV2(CompanyAccount, Login, Password, "", "Customer", arrInsertFieldsArray, arrInsertValueArray);
Dave