jQuery Grid Plugin - jqGrid

Hello,

I'm trying to display data in a subgrid, the main grid is working fine, but the subgrid simply won't load, "loading" is displayed but nothing happens.

I look in firebug, nothing is triggered, no bug, and my subgridurl is not called either.

grid.subgrid.js is in the same directory as jquery.jqGrid.min.js

here is my code : http://pastebin.com/WcTkBZun

Thank you for your help.