Hidden files are not accessable

friends I have Windows xp running on my laptop.Just before some day I hided some files by changing their folder options.Now I am not able to access those files.Window is showing them but I am not able to do anything with them like copy,paste,delete and not even able to see these files.This problem exist on only one folder,Means I have other hidden files and I can access them.But In this particular Folder all Image files are kind of locked. When I try to copy these file a error is showing that "File name you specified is not valid or too long.Specify a different file name".these files are king of important for me.So please tell me any way to recover my jpeg file.