[Freeswitch-users] IM isn't working

Hello, I'm having a problem that maybe at first it sounds basic but I couldn't solve it yet. The IM (instant message) was working for a time but after a moment it didn't work more. I'm able to send IMs from FS_CLI using "chat" command, but I can't make that the sip users could chat between them. The FS_CLI doesn't give me any info about the problem, I can't see anything from the logs, it llooks like as if everything is ok. Any help? Thank you!