Default [Q] zte blade cache clear problem

hi everybody, i tried to look also in the forum with the search and i didn't find anything relevant...
i have the blade from china unicom, i rooted it and installed cw. everything was almost smooth (i downloaded the wrong z4root, but then i got it right).
when i tried to make a backup or anything else vis CW it shows me this:

E: can't find misc
E: failed to find "cache" partition to mount at "/cache"
E: can't mount /cache/recovery/command
E: can't find misc
E: failed to find "cache" partition to mount at "/cache"
E: can't mount /cache/recovery/log
E: can't open /cache/recovery/log
E: failed to find "cache" partition to mount at "/cache"
E: can't mount /cache/recovery/last_log
E: can't open /cache/recovery/last_log
E: can't find misc
E: failed to find "cache" partition to mount at "/cache"

basically i can't do anything. i can't even make a factory reset.
what went wrong?