Please follow steps:
1. user "A" open cute messenger in IE
2. user "B" open cute messenger in chrome
3. user "A" add user "B" as contact person
4. user "B" add user "A" as contact person
5. user "A" click user "B" and send one test message
6. One conversation dialog will pop up in user "B" and user "B" can receive the message that user "A" sent
It works fine. Can you test it again? Did you follow the exactly same steps as mine? If you follow same steps, and this issue happen on your end, please check the build date of cutechat.dll which can be found in folder "bin".
Regards,
Eric