PHP - rename error - please help

[puzzled]

I'm creating a function that moves files from one location to another folder. I'm using the function "rename"(i got this from a thread here)

i'm having Warning that shows:

Warning: rename() [function.rename]: http wrapper does not support renaming in E:\Xampp\xampp\htdocs\wordpress2\wp-content\plugins\nextgen-gallery\view\gallery.php on line 83


this is line 83
$copied3 = rename($oldname, $newname);

anyone here know what's wrong? I'm working in localhost so i can't provide a link for it

thanks in advance for those who help.

[puzzled]

i tried changing the file location to see if the function really works and it doesn't

this is the error showing:

Warning: rename(/images/shirt39.jpg,/images/shirt35.jpg) [function.rename]: No error in E:\Xampp\xampp\htdocs\wordpress2\wp-content\plugins\nextgen-gallery\view\gallery.php on line 88


shirt39.jpg is an existing file and shirt35.jpg is supposed to be the result.. but it gives out that error.

can anyone help? Thanks

[puzzled]

follow up reply:

ok i tried doing this outside wordpress (note: that i'm using this inside wordpress) when i moved it out, it actually worked! so my question now is, what kind of location do i place so that it won't go on an error in wordpress? thanks.