Trying to update a value in the database. Asp.Net/C#/SQL/VS2005

[foolios]

I don't really know how to check why it's not working.
I have a try/catch that tells me in the catch that it didn't succeed but not sure how to really know what's going on with it.

Here's my update attempt:

SqlCommand comm = new SqlCommand("UPDATE inventoryTbl SET categoryID = @category WHERE id = @category", conn);

comm.Parameters.Add("@category", System.Data.SqlDbType.SmallInt);
comm.Parameters["@category"].Value = txtbx_itemCategory.Text;

try
{
// Execute the command
comm.ExecuteNonQuery();
// Reload page if the query executed successfully
//Response.Redirect("addrelatives.aspx");
}
catch
{
// Display error message
bttnApplyChanges.Text = "Error";
}
finally
{
// Close the connection
conn.Close();
}

[foolios]

Slight mistake, but still doesn't work when it appears to be corrected:

SqlCommand comm = new SqlCommand("UPDATE inventoryTbl SET categoryID = '@category' WHERE id = '@ID'", conn);

[foolios]

Removed the quotes, working.