I'm unsure what this problem may be and i've tried to fix every thing i've thought of to see if it would run through tool, however the lightmap just keeps showing that message even after i've fix the problems. so can anyone of you help me to fix this.
WARNING: encounter MS could be ambiguously attached to BSPs #0 and #1

WARNING: 1 clusters in structure_bsp lmt\hzc\a20\a20_b have no background sound
or sound environment.
start lmt\hzc\a20\a20_b
0.000000
radiosity error: smooth triangle group too big for page lmt\hzc\a20\shaders\fore
st_crash_b
EAX: 0xCACACACA
EBX: 0x1477D401
ECX: 0x000007E4
EDX: 0x00020AB8
EDI: 0x0013FA00
ESI: 0x00000000
EBP: 0x0013F8D8
ESP: 0x0013F8C8
EIP: 0x7C91E4F4, C3 8D A4 24 ?????
EXCEPTION halt in \halopc\haloce\source\structures\radiosity\intermediate_radios
ity.c,#2305: surface_index==last_material->first_surface_index+last_material->su
rface_count
What does this issue means.

Did you add a smoothing group to a high poly or to a large area?

try removing the smoothing group then run lightmaps to see if it works.
if it does adjust the smoothing then do lightmaps again.