i cant't upload files

[maximo]

Hello, i have a problem while i trying to upload a file by programing. May be someone can help me:

CODE

$codigo=$row["Ref"];
$path="TKE/$codigo";
mkdir($path,0777);
if (copy($archivo, "prueba/$codigo/$nombre_archivo")){

}


MESSAGE

Warning: "copy() [function.copy]: SAFE MODE Restriction in effect. The script whose uid is 776 is not allowed to access /home/...."

Warning "copy(prueba/1/prueba.gif) [function.copy]: failed to open stream:....."

NOTE: In my localhost it work, may be a permision problem?
NOTE 2: Sorry for my english, i hope you understand me.

Thanks