Okay then it's one of two things.
Either it's the way you saved the file, or where the file is.
Check that "c47a1" (the directory) is located under "Aces High II\Skins\C47a1" and not some other path.
Then go back and check how you saved these files. In photoshop, you go to Image > Mode > Indexed, select adaptive or whatever options you want, click Okay. It should ask you if you want to flatten all layers somewhere in this process. NOW go to File > Save As... and select bmp and name it either c47a1 or c47a2 depending on which file it's for. When you select "Save" it should ask you how many bits you want to save it as. Select windows, 8-bit. Hit okay.
Try again in AH.