After updating Plesk and new installing Plesk this is what I get. CGI Error The specified CGI application misbehaved by not returning a complete set of HTTP headers. Mailenable crashes every now and than, or even worse mail is not delivered and is somewhere on the server ?????? After a reboot (restarting the services doesn't work strange enough) After updating from 7.5.6 to 7.6 some PHP scripts gives the error: 502 Bad Gateway Web server received an invalid response while acting as a gateway or proxy server. 3 Websites on the server use the same PHP script. After updating Plesk it still works on 2, the other one gives CGI Error The specified CGI application misbehaved by not returning a complete set of HTTP headers. This is I think only a part of the problems on the working server after updating Plesk. Who knows what else might be wrong as not everything is tested or reported by customers. Now the second part of problems with Plesk. I installed a new server with Windows 2003 server Standard. This part works fine. Now the next step is installing Plesk. To improve performance it is adviced to use MSSQL for Plesk instead of MySQL. This is done (as advised). Installation is oke, so the next step is restore a backup of plesk from the online server. Here is where is goes wrong. After restoring (and it doesnâ€™t matter 1 or all domains) I get an error that the password for MSSQL is wrong. When checking the MSSQL database for this password it shows the correct one. I am realy desperate as my working server is messed up after the update and the new server (which is not at the datacentre but running a home so it can be installed) will not get good at all.