Problem to generate makefile under cygwin

Hello everybody,

first I should note that I am almost totally unexperienced in using 
compilers in a UNIX or LINUX environment.  Trying to compile FreeCiv under 
cygwin is my first attempt to learn this, but I got stuck at a what seems 
to be a very basic operation.  However, I could not find a solution by 
searching the web or the FreeCiv FAQs.  Here is the problem:

I installed cygwin under Windows XP with all the prerequisites mentioned in 
section 0 of INSTALL.  Then, to generate a makefile for the latest CVS 
version, I typed in the top directory containing the FreeCiv:

% ./autogen.sh

but got the error message:

bash: fg: %: no such job

Can anybody explain what went wrong, and how this problem can be solved?

d.k.