LINQ throwing invalid cast exception on a bigint

I have a LINQ query that looks something like this:

var clintLst = (from clntDt in ent.ClientDatas
                where clntDt.CompanyName.Substring(0,searchWord.Length).Equals(searchWord, StringComparison.CurrentCultureIgnoreCase)
                orderby clntDt.CompanyName
                select new { ClientDataID = clntDt.ClientDataID,
                    CompanyName = clntDt.CompanyName, 
                    ContactName = (clntDt.ContactFirstName + " " + clntDt.ContactLastName),
                    CompanyLocation = clntDt.Location.LocationCity.CityName + ", " + clntDt.Location.LocationState.StateCode
                } ).Distinct().Take(10);

However, it is throwing the following exception:

The specified cast from a materialized 'System.Int32' type to the 'System.Int64' type is not valid. [..] Exception Details: System.InvalidOperationException: The specified cast from a materialized 'System.Int32' type to the 'System.Int64' type is not valid.

Source File: C:\TempPersonalCode\TransportTracking\TransportTracking\TransportTracking\Controllers\AJAXController.cs Line: 35

(Line 35 is the select clause)

I'm confused because if change:

select new { ClientDataID = clntDt.ClientDataID,
    CompanyName = clntDt.CompanyName, 

to

select new { ClientDataID = (Int32)clntDt.ClientDataID,
    CompanyName = clntDt.CompanyName, 

then it works fine. Isn't an anonymous object supposed to use reflection to determine it's type? if so, why is it deciding that it's an "Int32" instead of a long? Within the EDMX I have it as an Int64.