It sounds like the issue is not with creating a texture, but with seeing the texture applied to an object once it it loaded into DarkBASIC (you didn't say if it was DBC or DBP, but the following advice should help either way).
Make sure the texture and the .dbo object are in the same folder. If it still doesn't work, you could load the texture in as an image and then use the TEXTURE OBJECT command.
I took your texture and applied it to a box, saved it as a .dbo file and grabbed a pic.
EDIT: No response from the OP in days? Scratches OP off of the 'people to help' list.