Unable to send/receive signal from wireless adapter.

It's a D-Link 614+ wireless router and a D-link dwl 520+ wireless
card. I cannot receive the signal worth a crap over this 52 foot
distance. It's broadband cable and the speed is the same as 3x 56k
phone line right now, horrible speeds compared to my part which is
wired directly.

Should I buy a new card or router or both?

Can someone suggest a new wireless adapter that has excellent
reception?

I really don't want to run wires if possible.

anyone?????