Url opening specific container

[zap]

I have a panotour where each pano.html is loaded inside an iframe hold in a container.
In order to open a specific panorama inside that container I tried to publish this code in hotspot url

http://194199.luxmap.lu/02-360photos/m1 ... html5.html
click on the forward arrow should open
<a href="http://194201.luxmap.lu/02-360photos/m1 ... html5.html" target="container360_iframe"> </a>
I tried as is in hotspot url and separating the target in the respectife hotspot field

sadly, panorama breaks out of its iframe container and opens as _self
any idea ?