对象名‘usertable’无效。。

对象名‘usertable’无效。。
system.Data.SqlClient.SqlException: 对象名 'usertable' 无效。
   在 System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
   在 System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
   在 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
   在 System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
   在 System.Data.SqlClient.SqlDataReader.ConsumeMetaData()
   在 System.Data.SqlClient.SqlDataReader.get_MetaData()
   在 System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
   在 System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async)
   在 System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result)
   在 System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
   在 System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
   在 System.Data.SqlClient.SqlCommand.ExecuteReader()
   在 local.GetFieldValue(String Sql, String Field)
   在 sync.msgform.button1_Click(Object sender, EventArgs e)
   在 sync.msgform.textBox2_PreviewKeyDown(Object sender, PreviewKeyDownEventArgs e)
   在 System.Windows.Forms.Control.OnPreviewKeyDown(PreviewKeyDownEventArgs e)
   在 System.Windows.Forms.Control.PreProcessControlMessageInternal(Control target, Message& msg)
   在 System.Windows.Forms.Application.ThreadContext.PreTranslateMessage(MSG& msg)
************** 已加载的程序集 **************
mscorlib
    程序集版本: 2.0.0.0
    Win32 版本: 2.0.50727.42 (RTM.050727-4200)
    基本代码: file:///C:/WINDOWS/Microsoft.NET/Framework/v2.0.50727/mscorlib.dll
----------------------------------------
sync
    程序集版本: 1.0.0.0
    Win32 版本: 1.0.0.0
    基本代码: file:///C:/Program%20Files/Eubase/Eubase/sync.exe
----------------------------------------
System.Windows.Forms
    程序集版本: 2.0.0.0
    Win32 版本: 2.0.50727.42 (RTM.050727-4200)
    基本代码: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Windows.Forms/2.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
----------------------------------------
System
    程序集版本: 2.0.0.0
    Win32 版本: 2.0.50727.42 (RTM.050727-4200)
    基本代码: file:///C:/WINDOWS/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
System.Drawing
    程序集版本: 2.0.0.0
    Win32 版本: 2.0.50727.42 (RTM.050727-4200)
    基本代码: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Drawing/2.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
----------------------------------------
System.Data
    程序集版本: 2.0.0.0
    Win32 版本: 2.0.50727.42 (RTM.050727-4200)
    基本代码: file:///C:/WINDOWS/assembly/GAC_32/System.Data/2.0.0.0__b77a5c561934e089/System.Data.dll
----------------------------------------
System.Configuration
    程序集版本: 2.0.0.0
    Win32 版本: 2.0.50727.42 (RTM.050727-4200)
    基本代码: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Configuration/2.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll
----------------------------------------
System.Xml
    程序集版本: 2.0.0.0
    Win32 版本: 2.0.50727.42 (RTM.050727-4200)
    基本代码: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Xml/2.0.0.0__b77a5c561934e089/System.Xml.dll
----------------------------------------
System.Transactions
    程序集版本: 2.0.0.0
    Win32 版本: 2.0.50727.42 (RTM.050727-4200)
    基本代码: file:///C:/WINDOWS/assembly/GAC_32/System.Transactions/2.0.0.0__b77a5c561934e089/System.Transactions.dll
----------------------------------------
System.EnterpriseServices
    程序集版本: 2.0.0.0
    Win32 版本: 2.0.50727.42 (RTM.050727-4200)
    基本代码: file:///C:/WINDOWS/assembly/GAC_32/System.EnterpriseServices/2.0.0.0__b03f5f7f11d50a3a/System.EnterpriseServices.dll
----------------------------------------
System.Windows.Forms.resources
    程序集版本: 2.0.0.0
    Win32 版本: 2.0.50727.42 (RTM.050727-4200)
    基本代码: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Windows.Forms.resources/2.0.0.0_zh-CHS_b77a5c561934e089/System.Windows.Forms.resources.dll
----------------------------------------
mscorlib.resources
    程序集版本: 2.0.0.0
    Win32 版本: 2.0.50727.42 (RTM.050727-4200)
    基本代码: file:///C:/WINDOWS/Microsoft.NET/Framework/v2.0.50727/mscorlib.dll
----------------------------------------
在两台机器上运行一个软件报的错。。帮帮忙