Chat room help

Hi Stipe i have already posted the question on the list but no reply.
i need to capture a sting of word that trail a keyword.
for example "CHAT hello all how are you"
so i use 
"http://digipoint1-sms.net/sms/chat.asp?topic=%s&content=%s"
when i use content=%s  and i have string of words i get the "could not fetch content error" if i have a single word it works fine.
my question is who can i capture a string of words with a single parameter