instable system...

Have experience all sorts of erros this weekend... from complete impossibility to access the server up to the last error now:

Error modifying the page
java.sql.SQLException: null, message from server: "Unknown column 't_188705.Monatslohn_394662' in 'field list'"

System does not appears to be stable...
Besides none of my request seem to succeed to get an answer for 4 days now.......

panadvice