cant connect to hkmp co-op server

[spark whale]

i have hkmp and hkmp pouch but cant connect to the server, ive connected before and my game crashed mid fight, is there a reason i cant connect

[sharp dome]

If you're not getting any sort of rejection message, then it is most likely just that you don't have a good enough connection to it right now.
This can be for any number of reasons, including wifi connection, or even the number of people currently connected to it (the more people that are connected, the worse everyone's connection is to an extent).