diff --git a/bsc/BSC_Tests_CBSP.ttcn b/bsc/BSC_Tests_CBSP.ttcn
index a56f7e6..67fbd50 100644
--- a/bsc/BSC_Tests_CBSP.ttcn
+++ b/bsc/BSC_Tests_CBSP.ttcn
@@ -660,7 +660,7 @@
 	f_cbsp_init_server(16001, 16501);
 
 	f_cbsp_write_emerg(g_cbsp_msg_id, g_cbsp_ser_no, cell_list);
-	var template (present) octetstring tr_apdu := f_gen_etws_pn(g_cbsp_msg_id, g_cbsp_ser_no);
+	var template (present) octetstring tr_apdu := f_gen_etws_pn(g_cbsp_ser_no, g_cbsp_msg_id);
 	timer T := 5.0;
 	T.start;
 	alt {
@@ -691,7 +691,7 @@
 	f_cbsp_write_emerg(g_cbsp_msg_id, g_cbsp_ser_no, cell_list);
 
 	/* first expect the PN to be enabled */
-	var template (present) octetstring tr_apdu := f_gen_etws_pn(g_cbsp_msg_id, g_cbsp_ser_no);
+	var template (present) octetstring tr_apdu := f_gen_etws_pn(g_cbsp_ser_no, g_cbsp_msg_id);
 	timer T := 5.0;
 	T.start;
 	alt {