diff --git a/tools/.arkmanager.swp b/tools/.arkmanager.swp
new file mode 100644
index 0000000..f31fe7d
Binary files /dev/null and b/tools/.arkmanager.swp differ
diff --git a/tools/arkmanager b/tools/arkmanager
index 4737cb5..bcac987 100755
--- a/tools/arkmanager
+++ b/tools/arkmanager
@@ -394,7 +394,7 @@ rconcmd() {
       my $reqid = 1;
       sendpkt($sock, $reqid, 3, $password);
       my ($resid, $restype, $rcvbody) = recvpkt($sock);
-      die "Authentication failed" if $resid == -1;
+      die "Authentication failed" if $resid == -1 or $resid == 0xFFFFFFFF;
     }
 
     my $port = $ARGV[0];