[GRASS-user] How to use v.mkgrid command under latlon environment

[SGW00412 at nifty.com]

I tried to make grid (resolution 50m) using v.mkgrid command under latlon 
environment.

I wrote this script:

v.mkgrid map=grid_try06 grid=50,50 position=coor coor=140.754,35.810 box=00:00:
02,00:00:02

so, warning massage;

Cannot open dbf database: home/shimada/hazaki_latlon/PERMANENT/dbf/
WARNING: Cannot open database 'home/shimada/hazaki_latlon/PERMANENT/dbf/'
ERROR: Cannot open database home/shimada/hazaki_latlon/PERMANENT/dbf/ by
       driver dbf

I tried again:

v.mkgrid map=grid_try07 grid=50,50 position=region coor=140.754,35.810 box=00:
00:02,00:00:02

But same warning message. 

finally, I tried...

v.mkgrid map=grid_tryb grid=50,50 position=region region=140.754,35.810 box=00:
00:02,00:00:02

Bad massage again...
Sorry, <region> is not a valid parameter

Why ? ( I guess I mistake about v.mkgrid command script under latlon environment.
..)

shimada