System.NullReferenceException: Object reference not set to an instance of an object.
at _Default.HexStringToByte(String hexString) in c:\inetpub\vhosts\spsichata.in\pay.spsichata.in\Default.aspx.cs:line 264
at _Default.decrypt(String plainText, String passphrase, String salt, Byte[] iv, Int32 iterations) in c:\inetpub\vhosts\spsichata.in\pay.spsichata.in\Default.aspx.cs:line 217
at _Default.Page_Load(Object sender, EventArgs e) in c:\inetpub\vhosts\spsichata.in\pay.spsichata.in\Default.aspx.cs:line 175