getting error in coded file

[ramchandra pati]

http://social.msdn.mic rosoft.com/Forums/en-US/databasedesign/thread/2e882b4f-3c0c-4136-be52-9c38f432b357/

i just go through above mention link and coded some file in asp .net but facing following problem. please help me to find out the issue
i have attached the coded file