SqlServer Compact "is not a valid Win32 application"

I have a website I'm working and im using Sql compact 4 sp1 for my database

I have sql compact installed on my pc and it works fine, however I am having problems trying to deploy the site to a host.

I have installed the nuget package "Microsoft.SqlServer.Compact" and have verified that the x86 and amd64 directories it creates in my bin folder are deployed

however, when i try to visit the website, i get the following error

is not a valid Win32 application. (Exception from HRESULT: 0x800700C1)

and the beginning of the stack trace reads

[BadImageFormatException: is not a valid Win32 application. (Exception from HRESULT: 0x800700C1)]
System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo) +0
System.Data.SqlServerCe.UnmanagedLibraryHelper..ctor(String fileName) +53 System.Data.SqlServerCe.NativeMethodsHelper..ctor(String modulePath) +28
System.Data.SqlServerCe.NativeMethods.LoadValidLibrary(String modulePath) +372

I have found one suggestion that says i should go into iis, find the application, go to advanced settings and check the enable 32-bit applications, which i havent done because i dont currently have access to the server, but is this really necessary, sql ce has x86 and x64 dlls so why would it need to run in 32 bit mode?