Hi Edward, I'm happy to assist you today.
I trust that you've gone through these steps below:
Enter the following commands in the privileged mode: (# *****)
Switch#delete flash:vlan.datDelete filename [vlan.dat]?Delete flash:vlan.dat? [confirm]
Switch#erase startup-configErasing the nvram filesystem will remove all configuration files! Continue? [confirm][OK]Erase of nvram: completeSwitch#00:04:46: %SYS-7-NV_BLOCK_INIT: Initalized the geometry of nvram
If you are prompted to save anything before reloading, respond by saying no.
If this still does not work, try erasing again and type: "wr" and "wr mem" to write your changes to the startup-config and running-config.
Let me know if that doesn't work for you.
Let me know. It sounds most like the changes aren't being written to memory and that's why nothing is changed after the reboot.