sql - Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding -

i calling stored procedure when getting error:

"timeout expired. timeout period elapsed prior completion of operation or server not responding."

public static dataset copywebsite(int oldsiteid, int newsiteid, int16 ispagecopyflag, string modulescommaseperated) {     return sqlhelper.executedataset(sqlhelper.connectionstring, "usp_copysite", oldsiteid, newsiteid, ispagecopyflag, modulescommaseperated); } 

how remove error?