Epilim dosage for children

hi everyone,
my three and half year old son has been on Epilim for about 9 weeks now and we seem to have reached a theraputic dose of 200mg x 2 daily, fingers crossed, as he hasnt had a seizure for 4 weeks.  i wa supposed to meet with the E NZ Association support person for our region today, but she postponed, but she did mention that the doseage sounded high for a young child.  she also said that it is worth considering x3 daily smaller doses, but our pediatrician thinks this caution is unneccessary.  any ideas? 
jo.