web services 服务使用oracle(9i)处理业务

System.Web.Services.Protocols.SoapException: 服务器无法处理请求。 ---> System.Exception: System.Data.OracleClient 需要 Oracle 客户端软件 8.1.7 或更高版本。
   在 System.Data.OracleClient.OCI.DetermineClientVersion()
   在 System.Data.OracleClient.OracleInternalConnection.OpenOnLocalTransaction(String userName, String password, String serverName, Boolean integratedSecurity, Boolean unicode, Boolean omitOracleConnectionName)
   在 System.Data.OracleClient.OracleInternalConnection..ctor(OracleConnectionString connectionOptions)
   在 System.Data.OracleClient.OracleConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningObject)
   在 System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options)
   在 System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject)
   在 System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject)
   在 System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject)
   在 System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection)
   在 System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)
   在 System.Data.OracleClient.OracleConnection.Open()
   在 TpsEC.Kernel.DBUtilities.MsOracleHelper.ExecuteScalar(String connectionString, CommandType commandType, String commandText, OracleParameter[] commandParameters) 位置 D:\NetSource\TpsEC\TpsEC.Kernel.DBUtilities\DbRefer\MsOracleHelper.cs:行号 944
   在 TpsEC.Kernel.DBUtilities.MsOracleHelper.ExecuteScalar(String connectionString, CommandType commandType, String commandText) 位置 D:\NetSource\TpsEC\TpsEC.Kernel.DBUtilities\DbRefer\MsOracleHelper.cs:行号 923
   在 TpsEC.Kernel.DBUtilities.OracleDbUtilities.ExecSqlScalar(String as_sqlstring, Dictionary`2 adic_where, WhereStyle aenum_wherestyle) 位置 D:\NetSource\TpsEC\TpsEC.Kernel.DBUtilities\DbProvider\OracleDbUtilities.cs:行号 486
   在 TpsEC.Kernel.DBUtilities.OracleDbUtilities.ExecSqlScalar(String as_sqlstring) 位置 D:\NetSource\TpsEC\TpsEC.Kernel.DBUtilities\DbProvider\OracleDbUtilities.cs:行号 446
   在 TpsEC.Kernel.StandardDAL.BillInfoDAL.getSequance(String tableName) 位置 D:\NetSource\TpsEC\TpsEC.Kernel.StandardDAL\BillInfoDAL.cs:行号 43
   在 TpsEC.BLL.WebService.BillInfoBll.getSequance(String tableName) 位置 D:\NetSource\TpsEC\TpsEC.BLL.WebService\BillInfoBll.asmx.cs:行号 674
   --- 内部异常堆栈跟踪的结尾 ---