ASP .Net After I change temp folder: Could not load file or assembly 'EntityFramework' or one of its dependencies

I have a webapplication, which is making pdf files from a database, using Entity Framework and ITextSharp, on a free host. (somee.com) But if I make several different files, the default temp folder gets full and I get a "Theres not enough disk space" exception. So I decided to change the temp folder to my webapplication folder /App_Data/Temp.

<compilation debug="true" targetFramework="4.0" tempDirectory="D:\DZHosts\LocalUser\user\webapp\App_Data\Temp">

But after that, I can't use my application, because I get an exception:

System.IO.FileLoadException: Could not load file or assembly 'EntityFramework' or one of its dependencies. There is not enough space on the disk. (Exception from HRESULT: 0x80070070)

I have enough space. What should I do about it?