Problem with recovery topic

Hi. I have flashed a custom recovery to my Galaxy Gio, based on CWM. But when I boot into recovery I keep getting these errors:

Code:

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E:Can't mount /cache/recovery/command
E:Can't mount /cache/recovery/log
E:Can't open /cache/recovery/log
E:Can't mount /cache/recovery/last_log
E:Can't open /cache/recovery/last_log

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and I can do nothing. Now how can I flash a new recovery? I can't use adb because it doesn't detect my device even if I have installed all the drivers, and I can't use Odin because I can't find version 4.42 anywhere!!

Please, help! Thank you