iPhone hang after jailbreak iOs 4.2.1

[mumiea]

hi,,
I've already jailbreak my iphone 4 using redsn0w,,when i open my cydia and search for some tweaks, i choose airplay enable to download and install it, after installation finish i click reboot device but when my iphone reboot it hang on the apple logo,,

can anyone help me please!!

 

[Pocobear]

If you re-boot while jailbroken with redsn0w you must use redsn0w to re-enter your jailbreak. Check out the instructions.

 

[TrUSP33D]

Yeah bro...everytime you restart your phone you have to REjailbreak it everytime....I'd downgrade OS and wait for untethered to come out