Problem with shadow-xx's registration page.

Hello people,
I am facing problems with registration page by shadow-xx

Code:

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Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at C:\Inetpub\vhosts\xxxxxxx\httpdocs\register\Registration.php:14) in C:\Inetpub\vhosts\xxxxxxxx\httpdocs\register\Registration.php on line 38

Warning: Cannot modify header information - headers already sent by (output started at C:\Inetpub\vhosts\xxxxxxx\httpdocs\register\Registration.php:14) in C:\Inetpub\vhosts\xxxxxxx\httpdocs\register\Registration.php on line 42

Warning: odbc_exec() [function.odbc-exec]: SQL error: [Microsoft][ODBC SQL Server Driver][SQL Server]Invalid column name 'RegIP'., SQL state S0022 in SQLExecDirect in C:\Inetpub\vhosts\xxxxxxxx\httpdocs\register\includes\odbc_functions.php on line 31

Warning: odbc_fetch_into(): supplied argument is not a valid ODBC result resource in C:\Inetpub\vhosts\xxxxxxxxx\httpdocs\register\includes\odbc_functions.php on line 40

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Help will be appreciated.
Thank You!