sprint 3.56 install problem

[madramper]

Hello,
I have tried several times to upgrade to the new sprint rom 3.56 from 3.35. However, it stops at 25%(error 302 connection lost) everytime and the phone stays in bootloader mode (multicolored screen). After trying several times to recover and rebooting pc (win xp), i just reload 3.35 with no problem. Phone rom history: 2.09 to 2.16 to 2.17 to titanunlocker to titanrelocker to 3.35. Any help will greatly appreciated.
madramper