SQL Server :: Special Characters In A SQL Datasource Update Query

I am having problems with the following update query that is part of an SQL Datasource. This query was automatically generated by VS2008 and I have formatted it so that it is easier to read.

UPDATE tblowner
SET altownerid = @AltOwnerID,
name = @Name,
address = @Address,
phyadd = @PhyAdd,
phone = @Phone,
fax = @Fax,
cellphone = @CellPhone,
email = @Email,
COMMENT = @Comment,
attention = @Attention,
contact = @Contact,
ownerdesc = @OwnerDesc,
taxid = @TaxID,
financialcontact = @FinancialContact,
fyenddate = @FYEndDate,
firstname = @FirstName,
lastname = @LastName,
stampinit = @StampInit,
stampdate = @StampDate,
zipid = @ZIPID,
[ZIP+4] = @N'@[ZIP+4]'
WHERE ( ownerid = @original_OwnerID )

Everything works but the [ZIP+4] field which does not update. I believe that VS2008 added the square brackets around the field name because of the plus character that it contains. If I change the ZIP+4 variable name to [ZIP+4] = @ZIP4 it still does not work. This brings up another question, I have never understood where these update queries are getting their data from.