Advance Poll Voting Error

Hi i am getting the following error message after voting on my polling question:

Warning: Cannot add header information - headers already sent by (output started at /host/n/a/s/p/o/r/nasha1.port5.com/hello.php:1) in /host/n/a/s/p/o/r/nasha1.port5.com/poll/poll_cookie.php on line 22

I had embedded the .php file contain the polling script into an other webpage using iframe. However I still get the above messge when i use just the .php file alone (without the iframe)

anyway idea why?

i would also like to set my pollings to have multiple votes from a single ip, is that possible?

any help would be greatly appreciated....

ps: anyone knows any cheap and good web host that offers cgi-bin and .php support with heaps of web space?