Thread:Extension talk:Semantic Forms Inputs/Installed, but doesn't seem to take effect

Hi, I'm having trouble getting SFI to work at all on my site. I have it installed (confirmed by the Version page), as well as MediaWiki (1.18.1), Semantic MediaWiki (Version 1.7.1), Semantic Forms (Version 2.4.2), etc. However, when I try adding SFI fields (I copied the Datepicker, Timepicker, and Menuselect examples exactly), it's as though SFI isn't installed at all, I just get the regular text input field, (and a list below it for menuselect). I do get a Javascript error

jQuery("#sfForm").data("SemanticForms") is undefined, but I'm not sure it's related, as I get the same error sometimes when there aren't any SFI fields on the page. I've tried the development version as well, and it doesn't seem to change anything.

I'm pretty much out of ideas; any help appreciated!