diff --git a/server/imserver/app.cc b/server/imserver/app.cc
index 223e3c9..f5e6a6f 100644
--- a/server/imserver/app.cc
+++ b/server/imserver/app.cc
@@ -379,7 +379,7 @@ void App::ProcessWSProxyMsg(f8::MsgHdr& hdr)
         cs::CMLoginCommonHead common_head;
         bool ok = common_head.ParseFromArray(hdr.buf + hdr.offset, hdr.buflen - hdr.offset);
         if (ok) {
-            if (common_head.has_server_id()) {
+            if (!common_head.has_server_id()) {
                 cs::CMLoginOld msg;
                 msg.ParseFromArray(hdr.buf + hdr.offset, hdr.buflen - hdr.offset);
                 PlayerMgr::Instance()->_CMLoginOld(hdr, msg);