#connector_select_filter problem

I want to put a select filter in the header of my grid for serverside filtering.

I have the folowing line in my code:

The text filters are OK but the select filter has no options.
If i edit the html with firebug and add the options the filter works.

Any ideas?

Normally, grid will try to request list of options from server side. So be sure that header was attached before data loading in grid.

Also, on server side , do you have any code which calls set_options for the column in question?
If there is no such code, grid will try to exect auto-generated sql query, to get possible options. You can try to enable logs and check that query and its results.