Can't finish downgrading iPad 1gen 5.1.1 to 4.2.1 or 4.3

Hi, I got ipad 1gen 3G 32gb where 5.1.1.(9B206) is on in. TinyUmbrella shows those SHSH blobs: 4.2.1 (8C148) 4.3 (8F190) 5.0.1 (9A405) 5.1.1. (9B206) I would like to downgrade to as lowest as possible firmware because 5.1.1. is way too slow. I downloaded iPad1,1_4.2.1_8C148_Restore from http://www.ipswdownloader.com/ and by redsn0w I used Extras-SHSH blobs - Stitch - chose my 4.2.1 IPSW and from Blobs - remote. It went ok. I entered iPad into DFU, closed iTunes, changed in private/etc/hosts last line by writing 74.208.105.171 gs.apple.com in the bottom line open Itunes and choose my compiled ipsw file and problems began... I couldn't wake iPad up. On display there was a picture of cable connecting to iTunes. I read that this might by 1015 problem so I tried to used: redsn0w - recovery fix but it didn't work. It couldn't enter into DFU mode tinyubrella - the same RecBoot - the same iReb - the same than I recovered it by iTunes again to 5.1.1 and did it over again with one by one firmware I have SHSH for, always the same error. I tried to put # before 74.208.105.171 gs.apple.com and 74.208.10.249 gs.apple.com but in vain what do I do wrong? is it possible that ipws is corect and I can't wake iPad up? is there any other newer saurik's server ip avaiable? is it possible that there is something wrong with cable? please help best regards