diff --git a/xCAT-server/share/xcat/tools/xCATreg b/xCAT-server/share/xcat/tools/xCATreg
old mode 100644
new mode 100755
index ed71bd173..c98d3fdcb
--- a/xCAT-server/share/xcat/tools/xCATreg
+++ b/xCAT-server/share/xcat/tools/xCATreg
@@ -55,11 +55,7 @@ my $regresultdir = "$regrootdir/regresult";
 my $todayregresultdir="";
 my $maildir="$regrootdir/mail";
 my $mailfile="";
-my $rootdir = "$::XCATROOT/share/xcat/tools/autotest";
-my %confkeys;
-my $mail_list = 0;
-my $needhelp  = 0;
-my $branch = "master";
+my $rootdir = "$::XCATROOT/share/xcat/tools/autotest"; my %confkeys; my $mail_list = 0; my $needhelp  = 0; my $branch = "master";
 my $management_node = undef;
 #my $verbose_mode = 0;
 my $updates_regression = 0;
@@ -524,7 +520,7 @@ sub copy_code {
             return 1;
         }
 		send_msg(2, "[$mn->$confkeys{$mn}][copy_code] copy ISO $iso to $mn successfully");
-		system ("sed -i 's|ISO=/\\S*|ISO=/$iso|g' $configfiledir/$regconf");
+		system ("sed -i 's|^ISO=/\\S*|ISO=/$iso|g' $configfiledir/$regconf");
 	}
 	
 	if($mn =~ /sles/){
@@ -548,7 +544,7 @@ sub copy_code {
             return 1;
         }
 		send_msg(2, "[$mn->$confkeys{$mn}][copy_code] copy ISO $iso to $mn successfully");	
-        system ("sed -i 's|ISO=/\\S*|ISO=/$iso|g' $configfiledir/$regconf");	
+        system ("sed -i 's|^ISO=/\\S*|ISO=/$iso|g' $configfiledir/$regconf");	
 
         if($os =~ /sles11/){
             $res = system("xdsh $confkeys{$mn}  \"mv /usr/lib/rpm/find-requires /usr/lib/rpm/find-requires.org\" && scp $osisodir/find-requires $confkeys{$mn}:/usr/lib/rpm/ > /dev/null");
@@ -581,7 +577,7 @@ sub copy_code {
             return 1;
         }
 		send_msg(2, "[$mn->$confkeys{$mn}][copy_code] copy ISO $iso to $mn successfully");	
-        system ("sed -i 's|ISO=/\\S*|ISO=/$iso|g' $configfiledir/$regconf");	
+        system ("sed -i 's|^ISO=/\\S*|ISO=/$iso|g' $configfiledir/$regconf");	
 	}
     return 0;
 }