http 411 error with cURL

hi all, Im getting an http 411 error when trying to post data with php's cURL functions. The spec says ***The message for this error code is "Length Required." The server refuses to accept the request without a defined Content- Length.*** Im confused on 2 points: * Is it the server i am posting *from* causing the error or is it the server im posting *to*? * How to resolve this? Much thx for any guidance here, this was not happening yesterday doing the same job.. weird! -- Nick W