Expect works fine,but only in foreground why?

I use this script for update my repo slackware(generate asc,txt,etc)

http://slackware.org.uk/people/alien/tools/gen_repos_files.sh

I have "automated" it with my expect script

#!/bin/bashset -efunct(){#script update repo httppass3="proot"    expect -c "    spawn /usr/local/bin/gen_repos_files.sh -l /tmp/changelog    expect \"Enter your GPG passphrase:  \"    send \"$pass3\n\"    interact"find /srv/httpd/htdocs/repos/slackware-mg/ -type f |xargs chmod 644  -v}while inotifywait -qqre modify /http/srv/httpd/htdocs/repos/slackware-mg; do funct; done

Works perfect,but only if i launch it from a shell,if i run it,from rc.localor crontab..it doen't work,the second script(gen_repos.sh) remain sleeping.Why?