one more thing when i am doing my own tekstures and i press pc conver -->curent asset only it shows 
Adding 'light.gdf'...
Adding 'locdmgtable.gdf'...
Adding 'material.gdf'...
Adding 'mptype.gdf'...
Adding 'projectileweapon.gdf'...
Adding 'rumble.gdf'...
Adding 'sample.gdf'...
Adding 'turretweapon.gdf'...
Adding 'vehicle.gdf'...
Adding 'vehicleweapon.gdf'...
Adding 'xanim.gdf'...
Adding 'xmodel.gdf'...
Adding 'xmodelalias.gdf'...
Adding 'main\images\tevy1.gdt'...
Converting 'material.gdf'...
'material.gdf' version change (0 -> 79)
Converting 'zp_logo'...
************ ERROR ************
non-power-of-2 image 'main\images\cod.dds' must use 'no tile'
Continue? ( (y)es / (n)o / yes (a)ll
what shall i do? 
