Problem to install gitlab parallel to rubystack

Hi Because gitlab hasn't a working rubystack-module, I must istall gitlab as stack. So I must set new Ports for this stack (90 for apache, 91 for ssl, 92 for myqsl).

i get this error:

Error running /opt/gitlab-5.1.0-3/mysql/scripts/myscript.sh 
/opt/gitlab-5.1.0-3/mysql **** : ERROR 2002 (HY000): Can't connect to local 
MySQL server through socket '/opt/gitlab-5.1.0-3/mysql/tmp/mysql.sock' (2)
ERROR 2002 (HY000): Can't connect to local MySQL server through socket 
'/opt/gitlab-5.1.0-3/mysql/tmp/mysql.sock' (2)
ERROR 2002 (HY000): Can't connect to local MySQL server through socket 
'/opt/gitlab-5.1.0-3/mysql/tmp/mysql.sock' (2)

Where is the Porblem?