peugeot 406 wont start ?

i've just tried to program a remote key following the instructions that were sent which are as follows
1. Turn the Ignition switch ON.
2. Press the large Plip key button (Primary Plip)
3. Within 10 seconds press the large Plip key button (Secondary Plip)
4. If there is one remote, press the Primary plip button twice.
5. Turn ignition OFF.
6. Test Plip’s for correct operation.
NOTE : On some 406 models, Plips cannot be re-synchronised unless the battery has been disconnected for 1 minute.
now my car wont start can anyone help