Store cryptography Key in key container

Dear All,

I am using the key container for encrypt and decrypt for the password.

I am using the csp class and RSACryptoServiceProvider class to manage the container and key.
My application is running perfectly when I am running in my visual studio 2010.

When I hosted the application on IIS 7.0 server locally then system not able to find the container from the system to get the key .

Error show like "The system cannot find the file specified.".

I am saving the name of the container in database after create the container.

Please help, Its highly appreciated.
<pre> public void GenKey_SaveInContainer(string ContainerName)
{
try
{
// Create the CspParameters object and set the key container
// name used to store the RSA key pair.
CspParameters cp = new CspParameters();
cp.KeyContainerName = ContainerName;

// Create a new instance of RSACryptoServiceProvider that accesses
// the key container MyKeyContainerName.
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(cp);

// Display the key information to the console.
//Console.WriteLine("Key added to container: \n {0}", rsa.ToXmlString(true));
string aa = rsa.ToXmlString(true);
}
catch (Exception Ex)
{
SaveExceptionInDatabase(Ex);

}
}
public string GetKeyFromContainer(string ContainerName)
{
string str = "";
try
{
// Create the CspParameters object and set the key container
// name used to store the RSA key pair.
CspParameters cp = new CspParameters();
cp.KeyContainerName = ContainerName;

// Create a new instance of RSACryptoServiceProvider that accesses
// the key container MyKeyContainerName.
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(cp);
//AesCryptoServiceProvider AES = new AesCryptoServiceProvider(cp);


return rsa.ToXmlString(true);
// Display the key information to the console.
//Console.WriteLine("Key retrieved from container : \n {0}", rsa.ToXmlString(true));
}
catch (Exception Ex)
{
SaveExceptionInDatabase(Ex);
return str;
}
}
public void DeleteKeyFromContainer(string ContainerName)
{

try
{
// Create the CspParameters object and set the key container
// name used to store the RSA key pair.
CspParameters cp = new CspParameters();
cp.KeyContainerName = ContainerName;

// Create a new instance of RSACryptoServiceProvider that accesses
// the key container.
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(cp);

// Delete the key entry in the container.
rsa.PersistKeyInCsp = false;

// Call Clear to release resources and delete the key from the container.
rsa.Clear();
rsa.Dispose();
}
catch (Exception Ex)
{
SaveExceptionInDatabase(Ex);

}

}</pre>