Sokkia stopped supporting the SDRMap software a few years ago but the documents below may help solving the most common problems:
Installing SDRmap on a new computer
You purchased a new computer (but not new software) and you would like to install SDRMap on the new PC. SDRmap installation on WinNT.pdf and White paper - SDR MD under win2000.pdf
For installation under Windows XP you may find
this link useful.
White paper - Install rebuild.pdf