The coordinates given are not the cache location.
The cache is located at the following position:
N51 (D+F+B).HG(A+B) W000 3(G-E).F(A-3)(C-2)
where A, B, C, D, E, F, G and H must be decoded from the following:
Remember that this puzzle was set in 2008, but would also be valid for several years before that.
