Rooting problem

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http://forum.xda-developers.com – Acera iconia tab a500. 4.0.3 officiall android. 1.054.00 version. I have some problems with installing drivers on my PC, so i can't root my device with ICS programm. Trying to root this way http://forum.xda-developers.com/show....php?t=1055354 but it still rooting for 30 mins, it doesn't work for me. Help me to root my device please . (HowTos)