The documentation says:
"If you've locked your database using a password and a key-disk, you can combine the two switches and open your database as follows: KeePass.exe C:\My Documents\MyDatabaseWithTwo.kdb -pw:abc -keyfile:F:\pwsafe.key"
This does not work: "invalid parameter"
Known bug, fixed already for the next version.
when's the next version due? :)
When it's ready. That's half the fun, waiting to see what he has incorporated in the new release.