Could not load file or assembly 'dnx.clr.managed' or one of its dependencies.......

Hi developer,

I am using ASP.Net 5 and behind a proxy. I created dnx.exe.config (for with proxy) in .......\.dnx\runtimes\dnx-clr-win-x86.1.0.0-beta7\bin.

<configuration><system.net><defaultProxy useDefaultCredentials="true" enabled="true"><proxy usesystemdefault="True"/></defaultProxy></system.net></configuration>

Here is my DNVM list:

So i run DNU restore for the packages and it seems ok

I Build it and no warning(s) and no error(s) which mean build succeeded but then i run IIS Express or Web. I am getting error message on page and it says:

here is Default code:

Global.json:
{
  "projects": [ "src", "test" ],
  "sdk": {
    "version": "1.0.0-beta7",
    "runtime": "clr",
    "architecture": "x86"
  }
}

Project.json:{
  "webroot": "wwwroot",
  "version": "1.0.0-*",

  "dependencies": {
    "Microsoft.AspNet.Diagnostics": "1.0.0-beta5",
    "Microsoft.AspNet.Mvc": "6.0.0-beta5",
    "Microsoft.AspNet.Mvc.TagHelpers": "6.0.0-beta5",
    "Microsoft.AspNet.Server.IIS": "1.0.0-beta5",
    "Microsoft.AspNet.Server.WebListener": "1.0.0-beta5",
    "Microsoft.AspNet.StaticFiles": "1.0.0-beta5",
    "Microsoft.AspNet.Tooling.Razor": "1.0.0-beta5",
    "Microsoft.Framework.Configuration.Json": "1.0.0-beta5",
    "Microsoft.Framework.Logging": "1.0.0-beta5",
    "Microsoft.Framework.Logging.Console": "1.0.0-beta5",
    "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0-beta5"
  },

  "commands": {
    "web": "Microsoft.AspNet.Hosting --config hosting.ini"
  },

  "frameworks": {
    "dnx451": { },
    "dnxcore50": { }
  },

  "exclude": [
    "wwwroot",
    "node_modules",
    "bower_components"
  ],
  "publishExclude": [
    "node_modules",
    "bower_components",
    "**.xproj",
    "**.user",
    "**.vspscc"
  ],
  "scripts": {
    "prepublish": [ "npm install", "bower install", "gulp clean", "gulp min" ]
  }
}

I am trying google it from 2-3 hours continuously still i have no clue. Any idea?

Thanks in advance