diff --git a/src/xhrListener.ts b/src/xhrListener.ts
index 1490810..03e35ab 100644
--- a/src/xhrListener.ts
+++ b/src/xhrListener.ts
@@ -30,16 +30,16 @@ class XhrListener {
   }
 
   public relayEvent(event: string, archMsg: ArchimedesMessage): boolean {
-    logger.debugLog.info(`XhrListener:relayEvent(event: ${event}, channel: ${archMsg.examId})`);
+    logger.debugLog.info(`XhrListener:relayEvent(event: ${event}, channel: ${archMsg.reservation_no})`);
     for (let c of this.#cm.channels) {
-      if (archMsg.examId === c.id) {
+      if (archMsg.reservation_no === c.id) {
         let dmCount: number = 0;
         for (let client of c.clients) {
           let nonce: string = crypto.randomBytes(4).toString("hex");
           // TODO: verify the nonce against the received reply, which we currently ignore
           client.directMessage(JSON.stringify({
             message_type: "broadcast",
-            message: { event_type: event, seq_id: nonce, reservation_no: archMsg.reservation_no }
+            message: { event_type: event, seq_id: nonce, examId: archMsg.examId }
           }));
           dmCount++;
         }