Why can't I access my altered table?

I completely changed a table with a new name and contents because I obtained errors whenever I tried to start my project with the “Start without debugging” Debug option.  The errors referred to a single database table, which I created locally, that used similar table names such as:

ForumCatTable forumcat = db.ForumCatTable.SingleOrDefault(p => p.ForumCatID == CatID);

References to other tables did not appear to be a problem, so I created a different table with the name of “ForumCategorys” and tried again to access it with the following code:

DataClassesDataContext db =newDataClassesDataContext();

ForumCategory forumcat = db.ForumCategorys.SingleOrDefault(p => p.ForumCatID == CatID);

I am able to view the table and how every item in the table has been defined as well as data previously stored in the table. But, I keep getting errors that say: “The type or namespace name ‘ForumCategory’ could not be found.” What am I doing wrong?  Please help.

Maurice