datagrid问题，帮忙看看

编译器输出如下：
C:\WINNT\system32> "c:\winnt\microsoft.net\framework\v1.1.4322\vbc.exe" /t:library /utf8output /R:"c:\winnt\assembly\gac\system.web.mobile\1.0.5000.0__b03f5f7f11d50a3a\system.web.mobile.dll" /R:"c:\winnt\assembly\gac\system.xml\1.0.5000.0__b77a5c561934e089\system.xml.dll" /R:"c:\winnt\assembly\gac\system.web.services\1.0.5000.0__b03f5f7f11d50a3a\system.web.services.dll" /R:"c:\winnt\assembly\gac\system\1.0.5000.0__b77a5c561934e089\system.dll" /R:"c:\winnt\assembly\gac\system.web\1.0.5000.0__b03f5f7f11d50a3a\system.web.dll" /R:"c:\winnt\assembly\gac\system.enterpriseservices\1.0.5000.0__b03f5f7f11d50a3a\system.enterpriseservices.dll" /R:"c:\winnt\assembly\gac\system.data\1.0.5000.0__b77a5c561934e089\system.data.dll" /R:"c:\winnt\assembly\gac\system.drawing\1.0.5000.0__b03f5f7f11d50a3a\system.drawing.dll" /out:"C:\WINNT\Microsoft.NET\Framework\v1.1.4322\Temporary ASP.NET Files\root\050a1654\638a5594\8vyr-s5h.dll" /debug-  "C:\WINNT\Microsoft.NET\Framework\v1.1.4322\Temporary ASP.NET Files\root\050a1654\638a5594\8vyr-s5h.0.vb"
Microsoft (R) Visual Basic .NET 编译器版本 7.10.3052.4
用于 Microsoft (R) .NET Framework 版本 1.1.4322.573
版权所有 (C) Microsoft Corporation 1987-2000。保留所有权利。C:\WINNT\Microsoft.NET\Framework\v1.1.4322\Temporary ASP.NET Files\root\050a1654\638a5594\8vyr-s5h.0.vb(20) : error BC30466: 无法找到 Imports“System.Data.SQL”的命名空间或类型“SQL”。Imports System.Data.SQL
        ~~~~~~~~~~~~~~~
E:\aspx\test1.aspx(6) : error BC30002: 未定义类型“SQLConnection”。            dim myconnection as SQLConnection
                                ~~~~~~~~~~~~~
E:\aspx\test1.aspx(7) : error BC30002: 未定义类型“sqldatasetcommand”。            dim mycommand as sqldatasetcommand
                             ~~~~~~~~~~~~~~~~~
E:\aspx\test1.aspx(8) : error BC30002: 未定义类型“sqlconnection”。            myconnection=new sqlconnection("sever='jall04';uid=sa;pwd=;database=wy")
                             ~~~~~~~~~~~~~                                          
E:\aspx\test1.aspx(9) : error BC30002: 未定义类型“sqldatasetcommand”。            mycommand=new sqldatasetcommand("select * from test1",myconnection)
                          ~~~~~~~~~~~~~~~~~                                    
E:\aspx\test1.aspx(12) : error BC30456: “tabels”不是“System.Data.DataSet”的成员。            mydatagrid.datasource=ds.tabels("infor").defaultview
                                  ~~~~~~~~~