[Haskell-cafe] Network CGI : outputFPS ByteString problem

Hello, When I try to render a byteString template using outputFPS like this : outputBsTemplate :: StringTemplate ByteString -> CGI CGIResult outputBsTemplate template = let bs = renderFPS template in outputFPS bs I get this error : Couldn't match expected type `Data.ByteString.Lazy.Internal.ByteString' against inferred type `ByteString' Is this a library problem? Is the CGI bound with a too specific ByteString ? Or am I doing something terrible wrong ? thanks in advance, Pieter -- Pieter Laeremans "The future is here. It's just not evenly distributed yet." W. Gibson