By the way, I'm running SQL Server Compact 4.0.8482.1. I don't think this is related to the localization problem that 3.5 had.

Call stack:

[IndexOutOfRangeException: An SqlCeParameter with ParameterName '1' is not contained by this SqlCeParameterCollection.]
   System.Data.SqlServerCe.SqlCeParameterCollection.ThrowParamterNotFoundException(String parameterName) +266
   System.Data.SqlServerCe.SqlCeParameterCollection.RangeCheck(String parameterName, SqlCeParameter& param) +164
   System.Data.SqlServerCe.SqlCeParameterCollection.get_Item(String parameterName) +50
   System.Data.SqlServerCe.SqlCeCommand.CreateParameterAccessor(MetaData[] metadata) +267
   System.Data.SqlServerCe.SqlCeCommand.CreateDataBindings() +161
   System.Data.SqlServerCe.SqlCeCommand.CompileQueryPlan() +863
   System.Data.SqlServerCe.SqlCeCommand.ExecuteCommand(CommandBehavior behavior, String method, ResultSetOptions options) +383
   System.Data.SqlServerCe.SqlCeCommand.ExecuteNonQuery() +46
   WebMatrix.Data.Database.Execute(String commandText, Object[] args) +194
   ASP._Page_ApptsImported_cshtml.Execute() in c:\My Documents\My Web Sites\WXwRazor1\ApptsImported.cshtml:36
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +273
   System.Web.WebPages.WebPage.ExecutePageHierarchy(IEnumerable`1 executors) +107
   System.Web.WebPages.WebPage.ExecutePageHierarchy() +149
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +172
   System.Web.WebPages.WebPageHttpHandler.ProcessRequestInternal(HttpContext context) +249