PES4 for PC - a DVD game - installs OK, but when I click to play, a blue Windows scren appears saying "please insert diskette into Drive B - press any key to continue".

Obviously only have floppy drive A, but when I press any key, the screen goes black and the floppy drive starts bleeping like mad - what the hell is going on??

Isn't graphics card, as just up-graded - can anyone help?