when i go to textures tab, choose my new file and click upload, the new file wont appear ingame OR on the website?

I suggest you upload the textures to the texture items, as opposed to using the 'Textures' page.

They tend to make less issues that way.

Make sure the format of the files is allowed (like .png).

i used .png instead of .tga now, works perfectly thanks!

No problem.