Virgin passengers are set for two days of disruptions with the airline shutting down its online check-in system from 8pm (AEDT) Tuesday.The Airline has also cancelled 16 flights which were scheduled to fly on Wednesday.Virgin Blue says it’s part of its plan to fix the computer problems that crashed its check-in system last weekend.The airline says online and telephone reservation services will be unavailable from 9pm tonight and Web check-in Kiosk check-in and Check-mate will be closed from 8pm from tonight until 5am Thursday.