Beta maps files : Access Violation

[seby122]

I downloaded WoW Beta, and i extracted eastern kingdom's mapfiles. Then I tried to make these maps work on a 3.3.5a client, it worked fine but near redridge my game crashed with this message :

"fail to load world\wmo\dungeon\az_karazahn\karazhan.wmo"

So, I put the old karazhan's WMOs in my MPQ, but now i have another wowerror :

"0xC0000005 (ACCESS_VIOLATION) at 001B:007D76BC"

Any idea to fix it ?