read problem with DDR2 HP II controller

What are your interface specs? Half rate DDR3? If you have a half rate controller you need 2 beats of write data on the local side, ie a 2 write burst, over 2 clock cycles, burst begin only goes high for the first one however. This is assuming local size is set to 2. If you only have half this data then you need to set local size to 1 for that write.