Write Error at 3%

I bought my FlashBoy a while back, but have not had much time until recently to try it.

I have now tried it in 2 different PC’s with 2 different USB Cables (One which is quite short that I use for my Western Digital USB HDD, and I think the other which is quite long came with the VecFlash).

Every time I try and flash a game to it, it erases OK and then starts writing the game and then shows WRITE ERROR at 3% every time. I have attached a screenshot.

Could anyone please help me?

Thanks,
Steve.