Please grab the latest version and check out how ores look.
One potential issue is that due to sheer amount of ores basic ones might be more rare then usual and harder to find.
You can use this command to generate ores in large area:
/c remote.call("RSO", "runTest", 2000)
Last number can be omitted - it will assume 2000 then. It's an amount of tiles around 0,0 to generate.