Entity Snaps Toolbar not Working

DraftSight V1R1.4, Windows XP SP3, Core2Duo, 3.16GHz, 4GB ram, Nvidia graphics card (GeForce 7600GS, 256MB ram).

No errors reported during installation; first time I've ever installed this application, and I'm a long-time 2D AutoCAD, IntelliCAD, AcceliCAD user. From the start, the entity snaps toolbar reports errors when buttons are clicked. Each button responds with a similar error. Three examples:

 _FROM

Unrecognized command FROM. Press F1 for help.

 _RP

Unrecognized command RP. Press F1 for help.

_APPINT

Unrecognized command APPINT. Press F1 for help.

Pushing F1 is does open a help window, but searching on _APPINT, or _RP, or _CEN, or _FROM, or any other snap command produces no  results, and offers no information on how the tool should be configured, how it works, or how it might be repaired.

If I type entitysnap in the command window, the configuration window comes up, and I can check/uncheck boxes, but the snaps don't work.

Does anybody know if there's a configuration error, or if this is a bug?