hello, everyone out there..

i need help trying to get iphonecdmatool to connect to my phone. i purchased the credit when i was running 5.1.1 and everything worked just fine on my phone. yesterday my kid got a hold of my iphone and pushed the upgrade to ios6 icon.now my problem is that i can't downgrade to 5.1.1 as keep getting error (1394) i've researched the internet on how to fix this but i just can't get anything to work.i've jailbroken the device with the tethered version for ios 6 i found on the internet...the phone appears on the flashing tool but when itry to connect it all it says is failed to accsss device. can somebody help me with this???