奇怪！D7带的SQLConnection为何连不上SqlServer啊？(50分)

具体设置是：
DriverName=MSSQL
HostName=shining
DataBase=public
User_Name=sa
Password=
BlobSize=-1
ErrorResourceFile=
LocaleCode=0000
MSSQL TransIsolation=ReadCommited
OS Authentication=False
将Connected设为true时总提示：Sql Error:Error Mapping failed