strange problem with size of uploaded files..

I've searched all over for the answer to this problem.. but haven't found anything.. I have a script that i use to upload files to a webserver and download them via my phone.. problem is, the files end up being about twice the size of the original file..

for example,    i upload a midi that is 22022 bytes,   on the server it ends up being 42762 bytes.

they are mostly midi and jpeg files.. this has worked fine in for the last 3 or 4 months on a different server. i recently moved my script to my other server and this started happening.. the old server was on linux, Apache/1.3.27 PHP Version 4.3.0 the new server is on linux, Apache/2.0.44 PHP Version 4.3.1