Deploy Web Part Into windows server 2008 R2

I have build one employee directory webpart that gets necessary information of user from sharepoint site. i have deployed in my testing server "Windows Server 2003 and Moss2007" and it's work fine.

When i tried to deploy on my production server "Windows Server 2008 R2 with Moss2007". It give me security error.

Request for the permission of type 'Microsoft.SharePoint.Security.SharePointPermission, Microsoft.SharePoint.Security, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c' failed."

I have also created security policy file and added reference to web.config. Still i getting same error please help on this. i am stuck here and not able to find any way to 开发者_开发知识库get out of this.

Thanks in advance.

Do you install your DLL into GAC? You must either install it into GAC (the solution does it for you if you specify the assembly location as GAC) or provide a custom CAS policy and register that policy in the web.config file. We usually prefer the first way, unless a customer specifically requires a custom CAS policy. This is much easier and I really doubt the security-wise effectiveness of the custom policy approach (unless your IT department actually goes over your code and examines what it can and cannot do, haven't found a department that would know how to do that)