scheduler lighbox get trapped under the modal in iframe

Hello everyone,
i have an html page that contains dhtmlxScheduler with lightbox that shows when the user wishs to create an events .
i have attached the page to a cell as follow "myLayout.cells(“c”).attachURL(“page1.html”); "

the scheduler is getting loaded correctly yet when the user wants to create an event the lightbox get trapped under the modal

i want the modal to be over all the parent page and the lighbox to be shown on top of it .

thank you for your help

please provide a demo so we could better understand the issue.

Do you mean that the lightbox is displayed below the modal overlay? Did you try changing z-indexes of the overlay element or of the lightbox?