Game doesn't start. Debian Squeeze, ATI 9250

[marateg]

after upgrade from lenny to squeeze game faults.
rolauncher starts, i can input login/password, change video settings and choose server. after this i have:

Saving backtrace to crash_backtrace_10193.log
Got SIGSEGV (segmentation fault)

this is crash_backtrace.log:

libs/libcore_client.so(_ZN10ClientBase14save_backtraceEv+0x79) [0xb7d51959]
libs/libcore_client.so(_ZN10ClientBase12client_crashEi+0x1b) [0xb7d51f4b]
[0xb7f53400]
/usr/lib/libGL.so.1 [0xb6df9286]
libs/libopengl_api.so(_ZN8Engine3D12RenderizerGL20init_graphics_systemEiiibb+0xc26) [0xb76a8b76]
libs/libcommon_entities.so(_ZN13DisplayEntity15creation_notifyEP7Message+0x4bc) [0xb7bb65fc]
libs/libentity_system.so(_ZN13EntityManager32initialize_entity_as_custom_typeEPKciS1_P7MessageP6Entity+0x48c) [0xb75160ac]
libs/libregnum_client.so(_ZN10GameClient19initialize_entitiesEv+0x94d) [0xb7edc23d]
libs/libregnum_client.so(_ZN10GameClient4initEiPPc+0x96b) [0xb7edf4ab]
libs/libregnum_client.so(_ZN10GameClientC1EiPPc+0x94b) [0xb7ee0b1b]
./game(main+0x259) [0x8048fc9]
/lib/i686/cmov/libc.so.6(__libc_start_main+0xe5) [0xb6f3d7a5]
./game(__gxx_personality_v0+0x61) [0x8048c71]

System:AMD SempronXP 1800+, 512MB DDR400, ATI Radeon 9250 128MB.
output from glxinfo in attach.

It is necessary for more info?