Readme updated

Resolves: #145

README.md

@@ -55,6 +55,8 @@ Supports [IBM MQ](https://www.ibm.com/support/knowledgecenter/en/SSFKSJ_9.0.0/co
 
 Was tested on MQ ver.9.0.x.x and MQ ver. 9.1.x.x.
 
+**Note:** The Publish/Subscribe Mode "[PSMODE](https://www.ibm.com/support/knowledgecenter/en/SSFKSJ_9.1.0/com.ibm.mq.con.doc/q017110_.htm)" Queue Manager attribute in IBM MQ should have value "enabled".
+
 #### Dependencies
 <sub><sup> [Back to TOC.](#table-of-contents) </sup></sub><br/>
 List of dependencies: