Code is not working on IIS. On local host its working fine.

Following is the code. When i m execuing it on the local host its working fine. But when i xecute it on IIS it giving the exception "System.UnauthorizedAccessException: Access to the path 'C:\Inetpub\wwwroot\CorpNet\RestoreTemp\' is denied. "  RestoreTemp is the directory which i m creating. CorpNet is the website name.

public static void UnzipIT(string sFileName, string sDirName)

{

ZipInputStream s = new ZipInputStream(File.OpenRead(sFileName));

ZipEntry theEntry;

theEntry = s.GetNextEntry();

while (!((theEntry == null)))

{

string directoryName = Path.GetDirectoryName(theEntry.Name);

string fileName = Path.GetFileName(theEntry.Name);

Directory.CreateDirectory(sDirName);    //Here the exception is coming...while

//running   thr IIS..

FileStream sWriter;

sWriter = File.Create(sDirName + fileName);

int size = 2048;

byte[] data = new byte[2049];

while ((true))

{

size = s.Read(data, 0, 2049);

if ((size > 0))

{

sWriter.Write(data, 0, size);

}

else

{

goto ex1;

}

}

ex1:

sWriter.Close();

theEntry = s.GetNextEntry();

}

s.Close();

}

Stack Trace:

[UnauthorizedAccessException: Access to the path 'C:\Inetpub\wwwroot\CorpNet\RestoreTemp\' is denied.]
   System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) +2014275
   System.IO.Directory.InternalCreateDirectory(String fullPath, String path, DirectorySecurity dirSecurity) +2710272
   System.IO.Directory.CreateDirectory(String path, DirectorySecurity directorySecurity) +150
   System.IO.Directory.CreateDirectory(String path) +6
   clsZip.UnzipIT(String sFileName, String sDirName) in c:\Inetpub\wwwroot\CorpNet\App_Code\clsZip.cs:37
   RealTimeSelect.Button1_Click(Object sender, EventArgs e) in c:\Inetpub\wwwroot\CorpNet\ArchiveSelect.aspx.cs:524
   System.Web.UI.WebControls.Button.OnClick(EventArgs e) +105
   System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +107
   System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11
   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5102

 Kindly guide me.