Cd-rom drive can't close its position?



hi, any one out there, could tell the problem and how to fix: i had Notebook Brand: Gateway Model: Solo 1150, the problem: when i try to close CD-ROM DRIVE to its position, but it’s always push out therefore i can’t install any program on CD unless i hold it back to close position!!! if update firmware may helps also guide me the site for downloading this Model: Matshita CD-ROM CR-177

thanks in advance…