[MonetDB-users] Cannot start mclient on Windows

Hi, I am running Vista 64. I installed the 64 msi of monetdb. When I start the client from the Start menu it works fine, but when I try to run mclient --help for example in a simple command prompt window I get a Windows error message: "This application has failed to start because libMapi.dll was not found. Re-installing the application may fix the problem". Could you please suggest something? Thanks.