There are 3 possible issues you are getting DC (disconnect) every 5 minutes:
1) You are wearing 380/400lvl items before required level (same thing for rings and pendants) wear only on required level !
2) You need to add 100+ more stats than required (more than its showing) to STR for your weapon (especially for Divine Stick for Summoner) !
3) Some 3rd party software can caused disconnect, so try to turn of Windows Firewall + Windows Defender + Anti-Virus + add EliteMU client to trusted programms !
Requirements for 380 level item:
- Regular 380 level item = 380 level
- Excellent 380 level item = 400 level
Some players might got disconnect while 380/400lvl items is equipped before level requirement !
- Take off 380/400 level items before you got required level !