NPOI dll(第三方excel writer dll)…System.Security。SecurityException:该程序集不允许部分受信任的调用者

I had developed portal on Asp.net mvc framework.I had hosted this site at godaddy hosting.I had a great problem on integrating third party dll i.e. NPOI (excel writer dll).It dispaly following error.I had developed portal on Asp.net mvc framework