LinQ not working after hosting my project to server.

Hello, Yesterday I have created a website for my brother. After upload all project files, I checked the events. Connected/Disconnected events are working perfectly but all event that I created with LinQ, dosn't working. It's says, "Invalid object name 'dbo.ViewPortfolio'." Error Line is, "GridView1.DataSource = db.ViewPortfolios.ToList();"

Now I'm going to retouch all evnts to convert LinQ to Connected/Disconnected, but It's very painfull to me also it's not proper solution.

Please help me to release from this pain. 

best regards

ehsan