I have identified an issue with the C64Net Wifi card that occurs on some machines. The issue results in a non-functional card, or a card that will not connect at 9600 baud. The resolution to this problem is the addition of a resistor to pull-up the C64-RTS signal to +5V.
This mod only applies to early v 04 boards . New boards have the modification. This mos will be incorporated to the next revision of the board.