Hello, I assume you're talking about a DICOM C-ECHO.
I tried to connect to remote server, but i had this error when I
tried echo or search.
You don't mention C-MOVE operations (sending or retrieving data). Does
this work? (I'll assume it doesn't.)
i checked all, ip, port, aetitle, firewall, anti virus.
If you've checked all of these things then you should probably look at
exactly what's going on at the network-level. Use tcpdump to capture
traffic when attempting the C-ECHO and either analyze it with Wireshark
or post it here for us to take a look. Make sure you don't leak any
sensitive data in the capture (you can use Wireshark to extract just
the relevant data streams if necessary).