Cant initialize database

hello

i did download the postgresql, but before the setup is finished the
errormessage 'cannot initialize' appears. anyway it does install
postgresql and i can open the pgadmin, but cannot connect.

i did install postgresql on my old windows computer and it worked. on
my new compuater, mac, i have installed parallels and want to install
postgresql there because the application which needs postgresql only
runs on windows. could this be the problem ?

thanks in advance for your support. i am going nuts here....

regards,
steve

ps: i do also speak german if that would be easier