Go to this site and find a firmware upgrade for the drive - Drivers & Downloads
Hope this works you could try this if it doesnt - there is also a chipset driver there you can check the date with what is installed in device manager - if you click on "Ricoh Driver" it has the install instructions
If any of the drivers wont install - because they are written for another OS rather than Windows 7 do the following :
To install a driver OR program in compatibility mode - right click the setup.exe file - click properties - click compatibility - check run in compatibility with vista/xp etc - check run as administrator - leave the rest blank. Start setup.exe and install.