async_read_until() and have it call my fill handler when it receives something.

Then the function that submits orders would call

write()

and then block waiting for the ack message using

read_until()

However, when I implement that, the client never seems to notice that a fill message is sent. It receives the acks just fine, and it successfully reads the datafeed coming in from the other tcp connection. I thought maybe the read_until() would cancel the async_read_until() so after I received the ack message I called async_read_until() again, but that didn't work either...

(The server works as it should, I tested it with telnet.)

Is it possible to mix sync/async reads in this way? Can anyone tell if I am doing something wrong? Do I need to do something else to make this work?