Are you referring to http 500 error?
1)check if the torrent save been saved to the torrent table
2) Check if the .torrent file you just uploaded is indeed in the upload directory.
Link me to your site please, if you are using a Xamp or something similar I should be able to access it if you give me your external ip
in CMD type..
Code:
C:\> nslookup myip.opendns.com resolver1.opendns.com
check the second paragraph on the secound line for your IP