Your simfile must include the banner, background, MP3, and DWI or SM file (or both). Please then proceed to archive this using your preferred compression program in the ZIP format, and upload to the database.
whenever i try to upload a .dwi or .sm file, i get "Only zip files allowed for upload. You uploaded:.sm"
If i'm right, you're having a problem similar or the same to me - I tried to upload both a zip archive and a sm. It didn't let me upload the SM with the error mesage you stated
I'm not sure what the feature is meant for, but it doesn't appear to work, unless it is some tool to let you update the stepchart/info of your sim without re-uploading the whole song. Not sure how that'd work with the sims being in zip archives though...
Of course it could just be intended to let you upload the SM/DWI seperately for simfile information purposes.
I just realized that you guys are trying to upload the DWI's and SM's for the parser, not as a whole simfile. This is a current issue, and I've notified Keith about it, and hopefully the issue will be resolved soon enough.