PS 6.0 and Windows Vista

I'm pretty new to using Photoshop 6.0. My problem though isin't with the using of it. I've made trial textures and saved it to the tga like it's been advised to do, only problem is is when I then log into sl and try to upload the image it'll come up as file not found. And for some reason the tga is the only thing that windows vista will let me look through when I'm on sl. So my question is this. Is there something that I may be doing wrong in the saving process, is there another way that I could possibly save the files to where they are TGA like sl and apparently my windows Vista want them to be, or is the problem with the windows themselves. If someone could please help me.

I don't use those Vista but I often experience this or file just doesn't show up regardless if I saved it as tga 32mb.
I just keep going back to file and saving and trying to find it upload file until it shows up or SL allows me to do so.

Well thank you anyways =-). I finally got a break and was able to upload a few images that I had been working on and I truely appreciate your time.