Only showing selected categories on MAP

Hi. I have the pro version and have an issue to only show some categories on the map.
Example
Dehli(id90)
TCE(id96)
HOPE(id97)
Madras(id98)
TCE(id104)
HOPE(id105)

I only want to show the 2 categories TCE
I got a reply on mail to use the GMAP Option in menu under: "Add to the queriry WHERE condition":
a.catid = 96 and a.catid = 104
I have done that but it says nothing to display
See attached. What am I doing wrong?
I have several location published in this 2 categories
Seems like i can only add 1 picture and not word document, so attached is the most important




Thanks for your help