it really helps if you post the picture here in the forums. I use photobucket. you can copy the link directly into the post so that everyone can see rather than going to an offsite link. you might even be able to with drop box? by inserting the link in the window that open up when you click in the tree symbol from the above icons, just saying.
what section and item of sks are you editing for this graphic? some programs don't respond to skinning well. are you attempting transparency, it's a bmp so transparency is obtained with "magic pink".
there are many people here who would help if they had more information to go by. I know it must be frustrating but hang in there.