Unable to find the requested .Net Framework Data Provider. It may not be installed

After completing the ASP.NET MVC 3 tutorial (find here), I tried to publish the app online. I contacted the hosting company to be sure if it’s possible to host MVC 3 apps. I had to bin deploy the (dll files) application. So after following some steps on hanselmans blog, I’m getting stuck on following error:

Is it possible to toggle Validation Data Annotations on/off in MVC 3?

I have two separate VIEWS accessing the same MODEL. When I put the validator data annotations on the model, it works as advertised and prevents the data from being submitted (for both views) if left blank or not within range. However, I have one view that should be able to allow empty or null values to be saved for a property whereas another view needs to require information to be entered or selected before it lets it through. In other words, I’d like to turn off the validator on the property within the MODEL for one view and leave it on for the other view. Here’s the example code: