I decided to move my project to OpenTK from TAO framework (btw, thank you for the great library). My problem is in my loading textures class. It says that the problem is in the 42nd line.
int openGLId = Ilut.ilutGLBindTexImage(); System.Diagnostics.Debug.Assert(openGLId != 0); // line 42
---- Assert Long Message ----
at GameLoop.TextureManager.LoadTexture(String textureId, String path) in C:\Users\Korisnik\Documents\Visual Studio 2010\Projects\Idezasada\Idezasad\TextureManager.cs:line 42