Error 25588 Cannot connect to OnLine

Hi, I need some help for the following error. From Informix error messages: > -25588 The appl process cannot connect to OnLine server server- > name. > This error can be caused by an error in the application. > Check your CONNECT statement and the sqlhosts file. The > error can also be caused by a system failure. If no immediate > cause can be found for the failure, note the circumstances > and contact your OnLine database administrator for > assistance. > The shared memory communication subsystem is down or > not functioning. Contact the OnLine database administrator > to report the problem. Despite this error message everything seems to be ok. I mean, the connect statement syntax, the sqlhosts file and the shared memory are ok. I don't know if there is a system failure. (Which kind of failure could be?) When I try to connect using dbaccess it works. I doesn't work with ESQL/C. I'm using OnLine 7.x. Any ideas? Thank you very much. ===================== Agostino Brunamontini Rome. Italy. =====================