I have now installed SH3 commander and cwx. Very great

Really liked it.
I just got one problem. Sometimes over the radio i get cordinates
in latitude, N45 W45,etcetc, but on my map i dont have this
cordinate to find the place,here i have the grid,like AF87,etc
How can i fix this? Very nooby question but i can't figure it out.
T.K