If you're running WhatPulse 1.5 on a Windows XP machine and you get the 'Unable to attach to the keyboard!' error, the problem may sort itself out after a manual restart of the programme.
If you're running WhatPulse 1.5 on a Windows ME/98 machine, please try the NoLag.exe version. If this doesn't work, make sure your DirectX version is up to date.
Please make sure your keyboard is plugged in properly and the drivers are up to date.
There is little information about this error at the moment, so if the above doesn't solve the problem, please feel free to join our forums and ask on there.