How to recover from SD card?

[lasvegaswings]

I was upgrading from 1.03 to 1.04 by using R. Batch Tool. But it gave an error and now my pc does not recognise the tablet anymore.

Is there any way to recover v. 1.03 from SD card ? Not upgrade just to recover

[lasvegaswings]

i changed to rom file name as update.img then i copy it in to sd card root.

open cube in recovery menu;
selected update rkimage from /sdcard

then

e:unknown volume for path [/update.img]
e:can't mount /update.img
can not found firmware image or invalid image

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