Legend Calendar view of VC doesn't work

Hello,

I have created a model which returning start date and end date of planned maintenance dates. I can show these dates in calendar view but when I try to add legend to this calendar not only I am not able to see any legend but also calendar is also empty, all dates are gone.

But when I remove all legends the calendar shows all dates in the same color.

I tried to find an answer for this issue on SDN and google but except 2 [not answered question |Visual Composer Calendar;on SDN, Couldn't find any usefull answer.

I also reviewed these:

http://help.sap.com/saphelp_gts72/helpdata/de/43/eca4ef15b22ae6e10000000a422035/content.htm

http://help.sap.com/saphelp_rc10/helpdata/en/43/eeb0b2a3597062e10000000a1553f6/content.htm

http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/9326072e-0c01-0010-bc97-f72e93338101?QuickLink=index&overridelayout=true

http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/63f2052e-0c01-0010-b9a2-e1f7457a7fbe?QuickLink=index&overridelayout=true

It is very simple but it doesn't work!!!

these are my settings;

from date field = @Begda

to date field = @endda

Calendar range = Auto

Legend placement = Below (not able to change)

legend filtering = filter

dynamic legend = not selected

legend ID field = when dynamic legend is not selected this field is disabled

the Table for legend:

1. = 0

Label = ABC  

Color = #339966

Condition = @SYSID=='ABC'

I really can't figure this out!    your help will be highly appreciated

Thanks.