The wait operation timed out inserting to Oracle table

Hi All, 

I am inserting data from an mssql table into an Oracle table. Everything works fiine when the data is below about 40 items but when the data is more i get the error below.

[Win32Exception (0x80004005): The wait operation timed out]

[SqlException (0x80131904): Timeout expired.  The timeout period elapsed prior to completion of the operation or the server is not responding.
The statement has been terminated.]

Can anyone help me on how to fix this problem.

Thanks and Regards