Cgi Error

I've been tring to fix this problem since I've had hosting here at Xisto, but I can't do it, so I need your help.Two of my cgi scripts aren't working right. The SAME cgi script worked right on another host. All I did was change the location of my data files, and it messed up. I looked to see if the data files was right at least 10 times, but it would have given an error if it couldn't find the file. I'm getting an Error 500.The Error Log showed this message:Premature end of script headers: /home/hamtaro/public_html/cgi-bin/hamtaro_petition.cgiWhat does that mean? That same message came up on a text file once before...Could someone please help me with this problem?(If I have to post the CGI script code, I will.)