Not able to delete/edit categories

[iphoto]

Hi,

I have just installed PP5.3. While eveyrhitng else is workin perfectly, I am not able to delete or edit any of the default category

e.g. I can not rename default "Main" Gallery to say "Contests" Gallery
same happens if I try to delete any of Main or Category A Gallery.

When I cick "Save Changes" its blank in right pane of administration.

Pl help

[Chuck S]

You can PM me link and login to see. I dont see any issue with this. You know you cant delete the members gallery but the others you can.