Both .asl and .grd files are used in Photoshop as tools for altering images (layers, gradients etc.), but direct conversion between these is highly unlikely. At best you can apply both styles to existing or new pictures, but direct asl to grd conversion most likely doesn't work.
This conversion entry was verified by us and conversion was flagged as wrong or not possible.
Usually this happens when the conversion would try to convert different types of data between each other, such as audio to image, or it is not possible because incompatibility between programs, caused by closed file formats, very limited support etc.
If you find entry that you feel is flagged as bad wrongly, please tell us in the discussion below with as much as information as possible so we can fix it.