[GRASS-dev] Problem in v.in.wfs

[kljxm]

I installed GRASS6.4.0RC5 on  Unbuntu 9.0.4. When executing v.in.wfs shell, i always confronted error message saying my xercer -c is not compatible to libgdal.
Would someone explain me the dependence or compatibility between xercer and libgdal (how can i get this information) ? 
Sequentially, how i should tackle this problem?   Thanks
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