How Initialize 2 block ram with xilinx project navigator

Hello, I need to initialize 2 similar Block Rams (ramb4_s16_s16) with different values, I'm using project navigator ISE 6.1 I have tried to initialize then with different values but when I compile and run my VHDL program in my FPGA the first one has also the same values as the second one in spite of being initialized with different values.

I would be very grateful if someone can help me to initialize the two Block Rams with different values, or if someone can say me what could be my problem.

Thanks a Lot.

oskarathletic