if statement to compare sentences not working in tcsh

I need to get a little if statement into a script written in tcsh. I want to check if the first line of a certain file is a specific sentence. However I don't get the script to work:

#!/bin/tcsh

set infile=baca.nn

set firstline=`head -n 1 $infile`

if ( $firstline == "Creating new file : ./data/weights.dat ..." ) then
    echo "Firstline is true"
else
    echo $firstline
endif

What am I doing wrong? I get the Error:

if: Expression Syntax.