Website wont let me upload 2 specific file

Hey, im uploading a texture set for cursors i made, and uploaded a bunch of the files and it worked perfectly except for 2 specific files, thhe "Unavailable cursor" and the "Help" cursor. I havent run many tests on the textures specificly (mostly because their rare and I have no idea how to) but it uploaded fine to my texture set. Its a .cur file, and I dont believe theres a resolution limit. Have no idea why they arent working, can anyone help?