pic16F610 programming problems

I'm trying to program the 16f610 using PBP2.60a and meprog/U2

The first word (0000) should be EF49 but it's failing to verify.
When i read it back it comes back with 2F49 3FFF 3FFF... etc

I have 12 of these chips, and it does it on all 12...

Other than all 12 chips being bad, what if anything could cause this problem?

Thanks

never mind, found it... it was to do with the config fuses overwriting the default ones...:o