Hi all, im after some help with a vw crafter ecu that i have accidently locked

The crafter needed its dpf and egr de-activating so using kess v2 i read the ecu file (all went fine). Using a program called "ecu safe" i de activated the dpf+egr then wrote the new file back to the vans ecu (all fine and van running perfect).

Now to the problem, the crafter needs a 62mph limit by law and it seems i had somehow removed this with the new file . I have re written the file with unchecking the Vlimit removal, saved the file and tried to write this to the ecu but it fails every time saying "wrong security code". The kess software will no longer work, ID-READING-WRITING-RECOVER all these give the same error. Looking back at ecu safe there is a check box marked "protection", did i accidently leave this box checked, could this be why i cant access the ecu?

Im hoping someone can help with this as i really need to put the limiter back on.

Please help