Can't edit photos stored on another pc in a network

[OrangeUFO]

I can seem to edit photos, and when l say edit, l mean rotate them etc across a network. Both the pc l am on and the pc the images are stored on are running windows xp pro and the network is run through a router. When ever l try to rotate one it says that the file is either already in use or set to read only. I have set the folder that that has the images in to be shared on the network and that anyone can modify them. Please, can anyone help as its driving me crazy!!!!!

[Kerplunk]

You need to check the permissions on the share and also the ntfs permissions on the folder.