Can't apply wind loads to horizontal members

For some reason STAAD is not applying distributed wind loads to horizontal members in my frame.  It correctly applies a distributed load to vertical members and places a node load at locations where the horizontal members intersect the vertical members.

The total force, based on pressure and area is correct.  However, I need to see the moments in the horizontal members for wind loads.

I have defined a wind load and a group "WWALL" for the face of the structure (the group includes the horizontal members).  I used the following method to assign the wind load to the group:

LOAD 5 LOADTYPE None  TITLE WIND WEST
WIND LOAD Z 1 TYPE 1 MEMB _WWALL

Any ideas on how to make the wind load be applied as a distributed load to horizontal members?

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