Lg Optimus 3d 2.3.5 root failed help!

Iam using 2.3.5 andriod gb. I have tried to install superoneclick 2.3.3 it dosent worked and then when i google it it says only superoneclick 2.3.1 can root my lg optimus 3d p920 but it does alot processing but it stuck at Step no 7 "waiting for your phone"

I have also tried MEGATRON root it does show that its success but i cannot use any root apps etc and CheckRoot shows "your phone is not rooted"

Please i need to root my phone help.