Cant start up game pls help

[Demosten]

i installed and updated the game succesfully however it gives me an error as soon as i start it after file check up the eror is this
LineageII crash report
2010.7.15 15:55:38
OS : Windows XP 5.1 (Build: 2600)
CPU : GenuineIntel  Pentium(R) Dual-Core  CPU      E6300  @ 2.80GHz @ 2808 MHz 2047MB RAM
Video : ATI Radeon HD 4670 (6947)
PosCode : LS8(83) 0:0:0 2/0 [152]

General protection fault!

History: UOrcMove::CalculateCRC32 <- 1.510000::0 <- UGameEngine::Init <- InitEngine
i red about the antivirus file ignore but i am with avast and dont know how to do it or even if it s because of that can any 1 help me

[Shabaka]

Bad client.
Not GF.

[Demosten]

what do you mean by that what must i do to fix it

[KnGhtmRe]

download gracia final from somewhere else and install it

[Demosten]

i did download from somewhere else and i have the same problem same error appears when i try to start up the game are you sure it s because of the place i download it or it s something else