Attachment Error

[SKETCHi]

An Error Has Occurred!
planetatmosphere.asl.
You cannot upload that type of file. The only allowed extensions are psd, fla, asl, abr.

I added asl to the allowed file type list, this error showed up after attempting to attach an .asl file. Anything I can do to fix this?

For those who don't know, .asl is PhotoShop Style file format.

[[Unknown]]

Don't put spaces between the extensions - use abc,def,ghi.

-[Unknown]