In un'applicazione che fino a ieri andava perfettamente, dopo alcune modifiche in locale e la pubblicazione sul server ottengo (solo sul server) questo errore:

da cosa può dipendere?? (uso MySQL + .NET)

Mi accade SOLO su un pagina e non in tutta l'applicazione (il resto è OK... salva e legge da DB corettamente)

Server Error in '/DEMO' Application.
--------------------------------------------------------------------------------

Unable to find the requested .Net Framework Data Provider. It may not be installed.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentException: Unable to find the requested .Net Framework Data Provider. It may not be installed.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[ArgumentException: Unable to find the requested .Net Framework Data Provider. It may not be installed.]
System.Data.Common.DbProviderFactories.GetFactory( String providerInvariantName) +1374215
System.Web.UI.WebControls.SqlDataSource.GetDbProvi derFactory() +63
System.Web.UI.WebControls.SqlDataSource.GetDbProvi derFactorySecure() +19

System.Web.UI.WebControls.SqlDataSourceView.Execut eSelect(DataSourceSelectArguments arguments) +120
System.Web.UI.DataSourceView.Select(DataSourceSele ctArguments arguments, DataSourceViewSelectCallback callback) +17
System.Web.UI.WebControls.DataBoundControl.Perform Select() +149
System.Web.UI.WebControls.BaseDataBoundControl.Dat aBind() +70
System.Web.UI.WebControls.GridView.DataBind() +4
System.Web.UI.WebControls.BaseDataBoundControl.Ens ureDataBound() +82

System.Web.UI.WebControls.CompositeDataBoundContro l.CreateChildControls() +69
System.Web.UI.Control.EnsureChildControls() +87
System.Web.UI.Control.PreRenderRecursiveInternal() +41
System.Web.UI.Control.PreRenderRecursiveInternal() +161
System.Web.UI.Control.PreRenderRecursiveInternal() +161
System.Web.UI.Control.PreRenderRecursiveInternal() +161
System.Web.UI.Control.PreRenderRecursiveInternal() +161