Problem Or Error in programming STM32 board with FTDI

[taksh]

I have GENERIC STM32 board and FTDI232 module and i saw many videos on youtube for programming stm32 using  FTDI232 but problem is of error. I was failed to upload code on stm32 using FTDI232.
There are two error coming.
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Error #1:
Got NACK from device on command 0x43
stm32flash 0.4
Can't initiate chip erase!

Failed to erase memory
http://stm32flash.googlecode.com/
------------------------------------------
Error #2:
Failed to init device.
stm32flash 0.4

http://stm32flash.googlecode.com/

Using Parser : Raw BINARY
Interface serial_w32: 115200 8E1
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ST LINK is the last option for STM32 Programming but parcel will take 12-30 days to reach destination. So, i don't want to waste my time.
Please help me.
Note: I have USBasp with small converter.

Thanks.