502 Gateway PHP

[Silvio Siefke]

Hello, 

i try to run a database management system and no matters what i use, i 
become 502 Bad Gateway.

the error log say
siefke /var/www/siefke/log $  cat error.log 
2014/04/29 00:52:05 [error] 20458#0: *1 recv() failed (104: Connection reset by peer) while reading response header from upstream, client: 10.42.0.20, server: silviosiefke_de, request: "POST /adminer.html HTTP/1.1", upstream: "fastcgi://unix:/var/tmp/php/silviosiefke.de.sock:", host: "silviosiefke_de", referrer: "http://silviosiefke_de/adminer.html"

I found strange because all other of php work only the database managements
want not work. Phpmyadmin,. sqlbuddy, adminer ever 502. 

The configuration in nginx of php path:
location ~ \.(php|htm|html)$ {
try_files $uri =404;
fastcgi_pass unix:/var/tmp/php/siefke.sock;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
include /etc/nginx/configuration/fastcgi_params;
}  

php config:
[siefke] 
 listen = /var/tmp/php/siefke.sock
 listen.owner = nginx
 listen.group = nginx
 listen.mode = 0660
 user = siefke 
 group = siefke 
 pm = ondemand
 pm.max_children = 100
 pm.process_idle_timeout = 5s 
 pm.start_servers = 1 
 pm.min_spare_servers = 1 
 pm.max_spare_servers = 35
 security.limit_extensions = .php .html
 php_flag[display_errors] = off 
 php_admin_value[error_log] = /var/www/siefke/log/php.log 
 php_admin_flag[log_errors] = on 
 php_admin_value[memory_limit] = 32M 
 php_admin_value[open_basedir] = /var/www/siefke:/usr/share/php  
 php_admin_value[session.save_path]= /var/www/siefke/tmp 
 php_admin_value[include_path] = /var/www/siefke/inc/php:/usr/share/php


Contao run without problems and the small scripts of php too. Has someone
an advice what running wrong?

Thank you for help & Nice Day
Silvio